Tess and Ben encounter a family custody dispute with a difference, when they meet a lesbian couple, Andrea and Natalie, their son Kai, and his father, Gethin, the sperm donor. Gethin has been refused access rights to his son, and when Natalie is knocked unconscious he is the natural suspect. Inspector Falcon-Price serves an intervention order on Gethin, who in turn threatens the Inspector's children. When the Inspector discovers his children missing the Heelers begin a search… but they find out more than the whereabouts of the children when they find Ben in bed with Felicity!