In the quiet, salt-laced air of Burntisland, 14-year-old Jess and her younger siblings, Tom and Lily, stumble upon an injured, mysterious man hiding in a forgotten, derelict boathouse. Convinced by Lily's innocent faith and Jess's yearning for something extraordinary, they believe him to be a figure of hope, perhaps even divine. As the adult world closes in with news of a dangerous fugitive, the trio must navigate a perilous secret, testing their loyalty, challenging their beliefs, and forcing them to confront the harsh truths hidden beneath the surface of their seemingly ordinary lives.