It is a hot summer and Zoe is trying to overcome a romantic break-up staying near a marvellous cove at the foot of a lighthouse in a little fishing village. Whilst free-diving a current sucks him into the depths and transports him to a mysterious grotto. Unable to find a way out he looses consciousness. On awaking he finds himself on the beach, in the middle of winter being rescued by a fisherman. He has no recollection of what has happened nor does he understand how so many months could have passed. When he gets back home, Zoe realises that his stay in the grotto has changed him: he can see into the future. Will Zoe be able to confront the truth that will alter the course of his life?