Highly intelligent and emotionally distant, Kirsten Clark has an aptitude for technology but never expected that she’d be hacking into the minds of the recently deceased.

A dangerous new drug has claimed the life of a young woman and, while the Stitchers team is looking for its source, they run into Detective Fisher, who is on the same trail.

When a murky stitch doesn’t give enough evidence against a newlywed husband accused of killing his wife, Kirsten attempts to prove her strong feelings about his guilt. This effect on Kirsten makes Cameron worry that she will end up like Marta. Meanwhile, Linus and Camille get to know each other better.

When the algorithm for the Stitchers program turns up among thousands of classified documents hidden by a conspiracy theorist, Kirsten starts to suspect her colleagues. Meanwhile, Kirsten starts getting cryptic messages from an unexpected source.

The Stitchers team investigates a mysterious car accident that resulted in the death of a traumatic brain injury researcher. Meanwhile, Kirsten asks Linus for help deciphering a clue left by Ed Clark as she continues to question Maggie for more information on the origin of the Stitchers program.

The Stitchers team investigates the murder of an online psychic whose symbolic, layered memories are further complicated when Kristen sees the murder of another person in the stitch. Maggie expresses her reservations about Kirsten’s relationship with Liam. Meanwhile, Camille hesitantly agrees to meet Linus’s parents.

The Stitchers team is on the defense when Cameron and Detective Fisher are targeted in a shooting. Kirsten's stitch leads them to Robert Barbiero, a security expert who has worked with Maggie in the past and was close to Kirsten's mom. As Kirsten follows the clues that Ed Clark left her, she finds unexpected answers to long-held questions.

When Kirsten wakes up to find that everyone in the stitch lab, except Cameron, is missing, the two search everywhere but only find a series of mysterious clues. Kirsten is forced to confront her own emotions about her relationship with Cameron.