Mary-Kate and Ashley are so excited to be away at summer camp! Some kids tell them the camp is haunted, but Mary-Kate and Ashley don't believe it. But then things start to get a little weird. First they hear ghostly howls outside their cabin. ... Then two dozen canoes vanish overnight. ... And it's getting worse. ... It seems rediculous, but could there possibly be a ghost at Camp Big Bear after all? The Trenchcoat Twins are on the case!