Stef Foster and Lena Adams, a lesbian couple, have a family of adopted, biological, and foster children. Mariana and Jesus are adopted 15-year-old twins and Brandon is Stef's 16-year-old biological son from a previous marriage.
An alien touring the galaxy breaks away from her group and meets two young inhabitants of the most dangerous place in the universe: the London suburb of Croydon.
Simon Spier keeps a huge secret from his family, his friends, and all of his classmates: he's gay. When that secret is threatened, Simon must face everyone and come to terms with his identity.