Undertow

The story follows Jim Prendergast, who survives a yacht sinking caused by a mysterious merchant ship, resulting in the tragic loss of his wife and daughter. As he navigates his grief, Jonathan Cooke from the British Embassy suspects the ship was involved in smuggling weapons for an IRA faction aiming to sabotage peace talks. Unwittingly drawn into a web of espionage orchestrated by MI6, Prendergast ultimately seeks revenge against those responsible for his family's deaths, culminating in a violent showdown at sea.