As the youngest of the five Walsh girls, Helen has had a tough time finding her way in the world; at thirty-three, she has her job as a private investigator that has proven less than fruitful and after losing her flat, she has moved back in with Mammy Walsh. Her hunky new boyfriend, Artie, and his three adorable children are a great distraction, but his beautiful ex-wife lives a little too close for comfort. Meanwhile, Helen runs into her ex-boyfriend...