The lighthouse at Haven Point has become a ramshackle home for any disabled child or adult who has ever felt excluded from society. They call themselves the Wrecklings, looting from passing ships with the help of the mermaids who live in their waters, and whispering superstitions to the wind and the waves. When Alpha spots a strange light up on the headland and realises that her beloved family are in danger of being discovered by Outsiders, it sets in motion a chain of events that will change Haven Point forever.