"Last Splash" follows three college roommates as they look forward to graduation and the coming summer. Phone in hand, the sexually curious Mona captures their lives together, including the more intimate moments. Frustrated by her secret crush, Emma struggles to let go and give into pleasure. Likable but a bit clueless, Eric and his girlfriend Allison might have crazy chemistry, but is he missing out on a deeper connection? When the group breaks into an empty house to have a pool party, an unexpected twist changes their lives and serves as the sexual awakening they all need.