I watched it. The three stories are completely separate. The mouse is in the second one. As it happens, that one is also by far the best.
The whole thing was a lot stranger than I was expecting. Worth a watch though.
I was surprised at just how much Jarvis was in this. He carries the entire second segment as lead. He's ok, pretty good at times. And he has a song over the closing credits. I thought it was good.
It's a film on Netflix called The House. Jarvis does some voice acting in it. It's well worth watching. It's in the style of Wes Anderson's Fantastic Mr Fox.