Mary is delighted about Living History Days, when many of Ivy Bay's businesses put on demonstrations of what life was like in historic Cape Cod. She's especially excited about the reenacted bank robbery at Ivy Bay Bank & Trust. But as Mary and the crowd watch the reenactment, they realize this fake crime is actually real! The masked, gun-wielding robber, played by Steve Althorpe, the bank manager, escapes with the contents of several safe deposit boxes before anyone realizes what's really happening.

The entire town is shocked. Why would Steve do such a thing? The police stage a manhunt without success, and the robbery makes it even more likely that the bank, already rumored to be in trouble, will have to close. But something about the theft doesn't feel right to Mary/ She's not sure Steve is the thief. But if the robber isn't Steve, who is it? And where is Steve?