The plot of the film goes like this. A guy decides to flat share with an attractive woman. They both have some sort of love lives, and they confide in each other of their woes on who they are interested in. However, they both act like they are a couple, doing board games, going for a run in the park etc. etc. Eventually one leaves as they move in with their partner, only eventually for that to fall through. As one of them is about to leave their old flat, they bump into each other again, and they again offer to flat share. Except this time, as they do so, they see that they were actually into each other all that time.. that's where the film ends.
It's a good film, not laugh out loud funny, but it's worth a watch, certainly it'll stay in my film collection, unlike other films recommended that turn out to be French turkeys!