A government program poisons millions. An immune grandfather-granddaughter duo survive, hunted by ruthless scalpers and an official determined to save his son, leading to a fight for survival amidst the chaos.

After being shut down for eight years, Camp Trustfall is reopened in 1994 by a new owner. The first summer has come to an end and the counselors are closing down the camp for the year when one by one, they start to disappear.