A group of squatters occupy an empty flat in a condemned tower in London, aiming to unite their neighbors to resist the demolition. Weaving together confused memories, Welcome Home moves between the squat and our protagonist's work in a care home. The squatters aim to bring all the residents together to resist the tower's demolition. But it's not as easy as that. Rain is in love with her housemate Eva, who unfortunately happens to be her best friend's girlfriend. She can't stand Will and his try-hard activism, and is avoiding Yaz, who used to tease her at school and lives in the tower. Her life in the squat is repeatedly interrupted by her work in a care home where she has grown particularly close to Doris, a resident with dementia, who used to live in their flat. Through Doris's stories we discover the history of the tower and another, older love triangle.