Have you noticed how "Until death do you part" has pretty unusual meaning when you add to that the fact that there is a woman whose husband is a professional killer? This hilarious comedy shows an unusual series of events when a quiet and peaceful dentist finds out who his first neighbour actually is. At the beginning of the movie the audience sees how good Nicholas 'Oz' Oseransky (Matthew Perry) as a dentist is. He and his assistant Jill St. Claire (Amanda Peet) make sure to be extra careful when it comes to their favourite patients. And everything Oz does is with a goal to divorce his current wife, Sophie Oseransky (Rosanna Arquette), who is more than just annoying. At one point, Sophie finds out that their next door neighbour is actually one of the most famous hitmen Jimmy 'The Tulip' Tudeski (Bruce Willis). So, she thinks of a plan to send Oz to Chicago, where he will inform Yanni, one of the mob bosses, about Jimmy's residence. While Oz is trying to get his wife off of the back, Sophie tells Jimmy that Oz is off to rat him out. So, the adventure begins and no one and nothing is as it seems at first look. So, everyone now need to watch their back because there might be severe damage otherwise.