In 1969 teen twins, Myles and Rose Wallace, are looking forward to enjoying every minute of their summer before entering high school. During an eventful summer of the first moon landing, the Vietnam conflict and the Woodstock music festival, they lived an idyllic childhood in St. Charles, Missouri. Everything changes when a friend is bruitally murdered and they feel compelled to solve the crime.
Adventure and danger follow them around the quaint river city as they collect clues and follow leads that answer the question of who murdered their former babysitter. Helped by their friends, a local detective and a homeless veteran they may have tackled a job that puts their very lives in peril. Not everone will live through this memorable summer.