A car crash out on the west coast, claims the lives of Jeremy and Amanda's Aunt Daphne and Uncle Grant. The location of the couple's children is unknown, and Jeremy, Amanda, Charlie, and Jenny join together again to seek clues that will help to locate the two missing kids. The four naturist sleuth base their search out of a clothing optional resort on the west coast, while working with the police to solve the Mystery of The Missing Cousins.