Sisters September and July share an intense bond, speaking in a secret language and keeping the outside world at a distance. After September is suspended from school, their mother brings them to a remote house on the Irish coast—where July begins to resist her sister’s increasingly sadistic control.

Caught between her alienated parents, teenage Ama starts a new relationship with a young lifeguard - but she can’t escape a quiet haunting that feels increasingly familiar.

It’s 2039 and temperatures are soaring, seas are rising, and the political climate is equally as menacing. Chance is living a life of crime just to get by, when her community is singled out for a government rejuvenation scheme, promising to bring her coastal town back to life. But when Chance falls in love with Franky, a girl with ties to the establishment, she and those closest to her begin to realize that all may not be as it seems.