The Ice Creams is based on the bestselling book by Dorothy Koomson about two girls who, one brief summer, find themselves involved with an abusive, controlling man. The situation spirals out of control and they are trial for his murder; ultimately Poppy gets sent to prison. Flash forward 17 years; Serena is married with a daughter in a seemingly comfortable life, returns to Brighton to take care of her dying mother. Poppy has been released and she wants answers. She claims not to have killed Marcus, but if she didn't and Serena didn't....then who did?