Gary and Leslie head to Japan for the annual gathering of the world's demon hunters, but Gary is in for the surprise of his life when he realizes all his old cohorts have retired - replaced by bright eyed and bushy tailed teenagers.

At a restaurant to celebrate his birthday, Gary thinks his teenage waiter could be the new chosen one. Nobody buys it, but Gary is determined to prove this kid is his replacement so he can finally retire.

Gary is finally enjoying his long overdue retirement when he hears his nemesis Fleshler has returned. He makes his way back to the ministry only to find that everything has changed in his absence - or has it?