Gemma's life involves ferrying her twin daughters around and dealing with her ex, Jason, and his Swedish girlfriend. So when handsome dad Tom asks her out and her son returns from travelling with friend Billy, Gemma unexpectedly finds she has more than one love interest.

After forcing Jason to give Alfie a job on the sandwich run, Gemma finds herself at a self-defence class run by Tom. When an inflamed Jason gate-crashes the class he is attacked from all sides, and Billy must decide if he can carry on living under Gemma's roof.