In the coastal resort of Margate, hotels lie empty and sun-faded 'For Sale' signs line the streets. The se is higher - it's higher everywhere - and those who can are moving inland. A young girl called Chance, however, is just arriving. Chance's family is one of many offered a cash grant to move out of London - and so she, her mother Jas and brother JD relocate to the seaside, just as the country edges towards vertiginous change. As they start to build a home by the sea, new forces intrude into their lives. JD's business partner, Kole, has a violent, charismatic energy that whirlpools around him and threatens to draw in the whole family. And when Chance comes across Franky, a girl her own age she has never seen before - well-spoken and wearing sunscreen - something catches in the air between them. Their fates are bound: a connection that is immediate, unshakeable, and, in a time when social divides have never cut sharper, dangerous.