Andrew and Zelda want to celebrate being a moth together, but not too explicitly, so they agree to merge their traditional Halloween parties instead. Stu and Stephie virulently object to loosing their duo costumes partners (Ghostbusters viz. Laverne and Shirley) since childhood, until their are offered to organize the thing jointly. However the themes prove unfit to combine and each MC just pushes his/her traditions, so the party couple must step in. It's all held at Andrew's office, but his Wallflower boss hijacks the whole thing for business purposes, expecting them to play the perfect Internet dating match.