The ladies of Team Flash celebrate "Girls Night Out" for Iris's bachelorette party. Join Iris, Cecile, Felicity, Caitlin, and Killer Frost as they try to have a nice fun evening totally interrupted by Amunet Black's third favorite henchman. Wow! Those girls know how to party! The boys get crazy too, watching some home movies! Ok, they're not too wild until Ralph Dibney stops by. He takes them to his favorite adult establishment and get Barry a little tipsy (ok, a lot.) Meanwhile, the girls try to keep Killer Frost at bay and stop this new threat before she does something she regrets. Joe contemplates being a daddy again as the boys start to get wild.