When Snowman's experiments on an infected human fail, Murdoch agrees to get more human subjects. Agent Taft discovers a clue about Marroquín. Lilia escapes from an enemy thanks to Dávila's help.

Murdoch takes extreme measures to contain the crisis, but Snowman has other plans. Dávila and Lilia face an unexpected ambush. Lucas's attempts to save an old friend put him in grave danger, and Marroquín realizes that his enemies have found him.