Detective Dove Milson and her fiancé Quinn are on the final stretch of a long drive back from Cornwall. Trying to get comfortable in the passenger seat, Dove hears her fiancé swear. Someone is falling from the motorway bridge. No, not one person. Three people. They plunge to the tarmac below. Dove rushes to the horrifying scene on the rain-swept motorway. Why would three people with no apparent connection jump off a bridge? Dove must find out—before anyone else is pushed over the edge.