London, June 2019. Maggie is 30, pregnant and broke. Faced with moving back to the home town she fought to escape, she’s wondering if having a baby with boyfriend Ed will be the last spontaneous act of her life. Ed, meanwhile, is harbouring secret dreams of his own. Phil hates his office job and is living for the weekend, while falling for his housemate, Keith. But there’s a problem: Keith already has a boyfriend. Then there’s Rosaleen, Phil’s mother, who’s tired of feeling like a side character in her own life. She’s just been diagnosed with cancer and is travelling to London to tell Phil, if she can ever get hold of him. As Saturday night approaches in a city on the brink of political upheaval, all their lives are set to change forever. It’s the hottest summer on record, and the weekend is about to begin.