In the war-torn Mediterranean the island of Malta is being slowly starved to death by the German navy's savage blockade. Only the SS Charon, a rusty eight-knot coal burner, moves with an ease in these dangerous waters. So the Royal Navy decides to use her. And her captain, Edward Trapp, privateer and professional survivor, with his ramshackle, unorthodox crew, suddenly finds himself fighting for the allies in a strange, harrowing, unorthodox war.