Things Stella and Jack have had blazing rows about:

- Misquoting Jurassic Park.
- Leaving a Coke can on the side of the bath.
- Fitting car seats for their hypothetical kids.

In other news, they're getting divorced.

But first, Stella's mum is throwing a murder mystery party and - with her dad losing his job, her mum's recent diagnosis, and some very odd behaviour from her sister - now is not the time to tell everyone.
All Stella and George have to do is make it through the day without their break-up being discovered - though it will soon turn out that having secrets runs in the family...