After sales for their hangover cure are slower than expected, the guys decide to take part in a drug trial for quick cash, but their plans are unexpectedly derailed by Paul Abdul. Meanwhile, Kelly faces an awkward situation after spending time with Leslie and Josh.

Cooper faces the ultimate, life-halting devastation when he loses his phone, and the guys stop at nothing to help him get it back. Meanwhile, Leslie and Kelly's karaoke duet turns into an all-out bar brawl.