Adam and Tina, blonde-haired siblings, find themselves alone and bored by the pool. Tina, in her skimpy bikini, starts to feel the heat, literally and figuratively. She dips into the water, her hands wandering beneath the surface, teasing her naughty bits. Adam watches, his own desires stirring. Soon, they're both in the pool, their bodies pressed close, hands exploring hidden places. The cool water does little to dampen their ardor as they succumb to their taboo desires.