An unlikely superhero with unprecedented strength and the amazing ability to fly is thwarting crime - and Sanctuary missions - throughout the city, sparking an investigation into his identity by the Sanctuary team. Magnus and Will are able to trap this costumed man by creating a phony emergency, which he responds to with vigor. The city's newest hero, who calls himself "The Adjuster" is quickly disabled and brought back to the Sanctuary for study.

Convinced that Magnus and Will are actually super-villains who have captured him in order to run experiments on him, The Adjuster - aka Walter (CHRISTOPHER GAUTHIER) - is less than cooperative. When a blood test reveals he doesn't possess the DNA of an Abnormal, Magnus and Will are baffled as to the origins of his super powers. Still convinced he's in the hands of the super-enemy, Walter manages to escape before the Sanctuary team can confirm the results of any more tests.

While Walter's efforts to fight crime are commendable, if rather fumbling in nature, he continues to risk the work of the Sanctuary and innocent lives (including his own). But when further test results come back, the team learns that Walter's health is actually rapidly failing. In order for him to stay alive, they need to find a way to lure him back to the Sanctuary for treatment.

Getting him back to the Sanctuary is not the problem. Helping him accept that he will have to go back to his day job as an insurance adjuster and give up his life as a superhero is another matter altogether. Despite his rapidly declining health, Walter refuses to give up his dream.

Elsewhere, Magnus, Will, and Declan (ROBERT LAWRENSON) investigate the discovery of an unusual eggshell remnant at a construction site; which leads to a search to locate a dangerous creature that has hatched and is now loose on the city...and quickly growing in size.

Elsewhere, Kate gets an unexpected call from her brother, who finds himself in deep with an organized crime boss. In order to save him, she must risk the security of the Sanctuary, and a newfound trust she is beginning to develop with the team.

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Dr. Helen Magnus and the team are still recuperating from the Cabal attacks that devastatingly took down so many Sanctuaries around the world.
Magnus and Druitt struggle to come to terms with the apparent death of their only daughter, Ashley. Druitt seeks revenge on her captor, the Cabal. Magnus, however, clings to the faint hope that Ashley could somehow still be alive. While Druitt leaves to exact his bloody revenge, Magnus takes a quiet, methodical approach to prove that Ashley is alive.
Meanwhile, Will, Henry, and Bigfoot take on the daunting task of organizing and processing the hundreds of Abnormals who survived the worldwide attacks, but now seek refuge at their Sanctuary.
Kate, not quite ready to give up her life as a petty thief and swindler, makes a bold move to cash in on a rare Abnormal species that has been delivered to the Sanctuary. With a quick phone call, she's worked up a deal, certain to catch a hefty sum. But as she prepares to capture her "windfall," the Abnormal escapes, sending her, along with an unimpressed Henry, on an adventurous hunt through the city for the runaway.

With all the chaos around them, the Sanctuary team must come to terms with how to rebuild after the Cabal's attacks.

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Still reeling from a violent encounter with the transformed Ashley, Helen Magnus is determined to find answers about the Cabal and their plans for her daughter.
Certain that Kate is still withholding information, a furious Magnus demands to know who her contact is at the Cabal. Kate is acutely aware that, without Magnus and the Sanctuary, she will be killed by the Cabal, herself, and therefore relents, revealing her contact protocols to reach Dana Whitcomb.

The Cabal's true agenda to destroy the Sanctuary Network is disclosed when Dana gives Magnus an unthinkable ultimatum - save Ashley and hand over the Sanctuary Network, or prepare to fight an impossible battle against the Cabal and her own daughter.

To make their point, the Cabal unleashes its first attack on the Sanctuary Network, as Ashley plus two of her powerful clones quickly annihilate the Tokyo location, leaving behind little more than fiery ruins and a convincing message that war has begun.

The Sanctuary team is forced to quickly create lines of defense against Ashley and her clones, a team of fully transformed Super Abnormals with devastating powers. Along with her newly cloned fighters, Ashley begins her onslaught, setting out to destroy each Sanctuary around the world.

The team prepares a final defense against an impending assault on the last standing Sanctuary and Magnus knows that by unleashing the only weapon that could defeat the Cabal's attacks, she is also risking the life of her only daughter.

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Dr. Helen Magnus continues her desperate search for her daughter, Ashley, who is still held prisoner by the Cabal. Together, Magnus and John Druitt interrogate their most elusive contacts around the globe in an attempt to find her and make sense of the Cabal's plan.

Since being captured by the Cabal, Ashley has been undergoing a series of injections and tests resulting in a formidable and alarming transformation. Unbeknownst to the Sanctuary team, her painful and dangerous mutation sets in motion the next phase of the Cabal's destructive mission.

When highly classified information is stolen from a top-secret Interpol location, Magnus is alerted. Will Zimmerman investigates and is surprised to see that it is Ashley on the security tapes pulling off the heist single-handedly. Will finds a connection between the stolen Interpol information and an old case that involved genetic manipulation of five young orphans.

Will and Magnus locate the one remaining test subject not yet captured, and visit his home to bring him to the safety of the Sanctuary. They are greeted at the house by a young woman who seems willing to accommodate them. But they quickly realize they've been tricked by a quick talking con-artist who is making a fast getaway.

Will and Magnus make a swift pursuit. After a dangerous car chase, they corner the woman and force her from her van at gunpoint. While they were able to capture her, she has somehow eluded them with the cargo and the 'orphan' is gone, undoubtedly en route to the Cabal.

In an angry interrogation, Magnus learns they are dealing with Kate Freelander (Agam Darshi), a thief-for-hire with connections to the Cabal. She'll work for whatever side pays her the most and has made a good living eluding authorities and getting what she wants. Despite being under Henry's watchful eye, she is able to make her escape. There's no mistaking she's good at what she does.

Feeling temporarily defeated, the team heads back to the Sanctuary to piece together the new information they have gathered. They start making connections between the orphans, Ashley's disappearance and the Cabal's mysterious ultimate goal.

Kate, meanwhile, makes contact with Cabal leader Dana Whitcomb, demanding payment for her work. But Dana has no intention of paying Kate what she's owed. In fact for allowing herself to be caught, albeit temporarily by Magnus, Kate realizes she is now an enemy of the Cabal and her life is in immediate danger. Wounded from a violent clash with Cabal agents, Kate is forced to seek refuge at the Sanctuary. Magnus treats her injuries, but shows her no patience and presses for more information on the Cabal and Ashley's whereabouts. Aware that she is no longer safe outside of the Sanctuary, Kate relents and gives up the location of one of the Cabal's facilities.

The team quickly assembles to infiltrate the location in the hope of bringing Ashley home. Teleported there by Druitt, they instead find themselves in a completely empty warehouse. Suddenly, Ashley appears. But she's not the Ashley they know. Void of any emotion, she goes on the attack and the team realizes that they are dealing with a force far more powerful than they could have ever imagined. About to be killed the new Super Abnormal Ashley, they quickly retreat and teleport back to the Sanctuary.

They now painfully understand that this "new" Ashley is under the control of the Cabal and is the pivotal force behind their catastrophic plan to bring down the Sanctuary Network.

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