France, 1944. Pilot Officer George Madoc is tasked with a covert mission to the occupied coast of Brittany: under cover of night, he must ferry a French secret agent - an assassin - across the St Cyriac Shoals. It is an encounter that changes him for ever. Over sixty years later, his son Iain is offered the key to the mystery which has forced a wedge between him and his father. George's wartime launch has been found and the past is coming back to life. Iain travels to France, desperate to discover the truth, but the village of St Cyriac will not give up its secrets easily. For some, the past is still dangerously alive, and Iain may pay the price of uncovering it...