When Marge Christensen arrives at Ocean Shores on Friday afternoon, it feels like the perfect place to get away from it all for a week and do a little painting. But, on Sunday afternoon, a man's body is discovered on the beach. The man has been murdered, and when Marge's son, Robert, is implicated in the murder, Marge must delve into the tangle of relationships, motives, and opportunity to uncover the truth.