Twenty-five years after environmental collapse left the Earth uninhabitable, Mother, Father and Son are confined to their palatial bunker, where they struggle to maintain hope and a sense of normalcy by clinging to the rituals of daily life - until the arrival of a stranger, Girl, upends their happy routine. Son, a naïve twenty-something who has never seen the outside world, is fascinated by the newcomer, and suddenly the delicate bonds of blind optimism that have held this wealthy clan together begin to fray. As tensions rise, their seemingly idyllic existence starts to crumble, with long-repressed feelings of remorse and resentment threatening to destroy the family's delicate balance. But their reckoning with difficult truths also points to a different way forward, one based on acceptance, love, and a capacity for change.