Bag of excuses Peter selfishly refuses to cover shifts at work. So when his bluff is called, the challenge is on as Peter goes the extra mile to prove that he's busy.

Awkward introvert Peter has worked in the same place all of his life. His co-workers know him well enough to understand that Peter has no intention of ever helping them cover a shift. So when Shelley needs the night off to go to a party, she tries her luck ultra-forcefully.

Although Peter still declines to help her out, her insistence backs him into a corner that he can only get himself away from by coming up with an even bigger whopper of an excuse than normal. And that excuse is that introverted, no-pals Peter is too busy with his made-up friends going to an even bigger party than the one Shelley will be missing out on.

Luckily for Peter, this does get him out of covering a shift but unluckily for him Shelley is now expecting to see proof of this mad night out. The result is a real party that's as "mental" as Peter made out, but for all the wrong reasons.