The title of British indie says it all: A sexy spin on a luxurious yacht in Mallorca, Spain, turns into not such a good time when Josh (Julian Morris) and Lisa (Sian Breckin)—being videotaped—engage in the titular sexual act, with fatal results.

While the female members of this party want to report the incident to the authorities, Josh and his friends decide to throw Lisa's body overboard. The night takes an even more disastrous (and even deadlier) turn as the two genders fight over how to proceed, both of them angling for the videotape that will explain it all.