Having realized that a deadly threat has infiltrated CrashCon, the busiest event of the year, Liz realizes that she can't save everyone she loves -- and with Max facing immediate danger, she and Isobel must make a heart-wrenching choice. Meanwhile, Michael finds himself caught up in the conflict between Jesse and Alex once again, even as Maria's life hangs in the balance elsewhere, and Kyle faces a moral dilemma when the enemy requires medical attention.