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Darius and Lesky trace the anonymous message to a youth center. Meanwhile, Christa contends with a surprise visitor and painful reminders of her past.

As Christa begins decrypting the documents, Darius receives a tip about Linus. Back at the ward, Christa asks Lana for help with a secret plan.

A gruesome discovery prompts Darius and Christa to reconstruct Linn Gonzales's journey along a desolate bus route.

Flashbacks reveal what happened the night of the stadium suicides. Ten years later, Caron finds his secret -- and his life's work -- in danger.

Forced off the case, Darius works alone to connect the dots between the Future Foundation, the bodies at the beach and Christa's disappearance.