When teenager Dylan pulls herself free from a train wreck and emerges onto an almost deserted Scottish hillside, she believes she is the only survivor Seeing the figure of a boy on the bank she enlists his help But Tristan is no ordinary passerby, and Dylan soon learns that instead of being the only survivor of the wreck, she is in fact the only fatality And, Tristan is no normal teenage boy - he is her ferryman tasked with guiding her through the wasteland to her afterlife