Twelve-year-old Jennifer Chang is spending the summer on Vashon Island with her family, and she has a strange feeling that being here is going to make for the most adventurous summer ever. Then, when Jennifer meets Cass Krewson, the adventure she imagines begins for real!
Something mysterious is happening at Bunratty Castle, the island's very own haunted house, and Jennifer and Cass find themselves caught in the middle. Will the girls unravel the secret of the creepy castle?