When looking for the subject of her next book, her agent suggests basing it on an event from Erica's own life. Looking back to her teenage years, she recalls the disappearance of her classmate, Peter. As she begins digging into the past, she sets off a chain of events that brings the mystery closer to home.

The coast guard finds two amateur divers dead after a storm and then discovers that two more are missing. Erica investigates something that could link all of the victims together: the divers had salvaged a shipwreck from the 1820s, where they found intact bottles of wine worth millions at auction.