The Case of the Creepy Castle
It's Halloween and Mary-Kate and Ashley are bummed because they don't have a mystery to solve. But things start looking up when Great-Grandma Olive announces that she's taking the twins and their friends to the coolest new haunted house in town -- Creepy Castle. It's a blast until Mary-Kate and Ashley's friends start disappearing! The Trenchcoat Twins are back on the trail to solve a mystery that's their spookiest yet!