Duke and Alice, a loving couple in their late sixties, live in a quiet neighborhood in Waterfield, Iowa. In the spring of 2011, they travel to California in order to bring their troubled teenage grandson, Jason, back to Iowa for a summer stay with them. Jason's wealthy father, Calvin, had earlier become involved with illegal drugs, and began frequenting parties offering drugs, as well as sex. Calvin soon introduced his wife, Mary, into the drug and sex scene. Jason's parents eventually obtain a divorce, and soon afterwards, law officers arrest Calvin for illegal drug crimes. As Jason begins bonding with Duke and Alice, Mary enters a thirty-day drug rehabilitation program in California. When Mary finishes the program, she moves to Waterfield, Iowa. Calvin blames Duke, Alice, and Mary for his arrest, and eventually drives to Iowa with plans to settle the score violently. Will Duke, Alice, and Mary survive Calvin's drug induced, violent actions?