Dr. Cassian, the new team leader, sends the biocrisis team to investigate a Chicago high-rise. A mysterious rash of suicides caused by hallucinations has led to 79 deaths in the two years since its opening.

Cassian's niece falls under the spell of a self-proclaimed healer who claims to be able to cure deadly diseases. He appears to heal people-until they defy him. The team infiltrates his compound in Mexico to rescue Cassian's niece, who has been diagnosed with leukemia.