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.