Killjoy is back in the fourth installment of the demonic clown series. This time Killjoy is being accused of not being evil, since he let one of his victims(Sandie) get away. Killjoy must rely on his only chance of proving how evil he really is... get Sandie into hell as his witness.

The demon clown Killjoy is resurrected once again, but this time he is not given the name of his victim and is trapped in his realm. Using a magic mirror he lures four unsuspecting college students into his realm where he can have his macabre fun! A mysterious man returns and we finally discover who Killjoy's true target is!

Four friends head to Vegas for a 21st birthday in hopes of finding adventure, debauchery and memories that will last them a lifetime.