Colwyn Yeats, expert sailor and veteran of the war in Afghanistan, is all set to spend his summer working towards his PhD aboard the university’s research vessel, but the trip is cancelled at the last moment, leaving him at a loose end.
Fortune arrives when an old college pal appears, and Yeats agrees to act as skipper and navigator on a transatlantic voyage the man and his two friends have planned for the summer.
Misfortune arrives when he’s found alone and with no identification on a rocky shore amidst the wreckage of the boat, and wakes up in a rescue helicopter, unable to see, and suffering from amnesia.
Who is he? Where does he come from? He doesn’t know, and the authorities can’t find out, so what is to be done about him?