Two bodies are washed ashore, one in Provincetown on Cape Cod, the other on the shore of Boston Harbor. Both bodies look alike and are carrying the wallets of two other people who also resemble the two dead bodies. How can this be?

Follow the trail of leads found by Harry Esten, a former FBI agent, as he and his wife, Laura, join forces with two Massachusetts police forces to find the assailant.

The suspense is unending, and the motives are mind-boggling, but the ending is nothing like you would expect.