Life seems idyllic for Marisa until her son is suddenly diagnosed with leukaemia following a soccer match. After trying to contact her husband David, who is interstate at a conference, she becomes aware that he has been involved in an affair - one of many. The only possibility of a cure is if David has had a child from one of his many flings that is a bone-marrow match, so Marisa tracks down the women he might have had affairs with to see if any might have had his child. Meanwhile, Jack befriends Finn, a young Irish boy in the next bed who has been travelling the world with his father, Connor. Initial disdain turns to mutual respect as both Marisa and Connor find their own ways to deal with their respective sons' illnesses.