It's a milestone birthday for Vince, and Stuart is ready for a good time. To ensure a good time happens, he plans a surprise party for Vince, but true to Stuart's nature, the invite list reflects his own interests rather than Stuart's. When Rosalie from Vince's office shows up, the night threatens to turn disastrous, and in the following day's aftermath, Stuart is paranoid that Rosalie will ruin his career at the office.