"Pool Heat" is an erotic drama about a seemingly carefree summer gathering that takes an unexpected turn when Marcus and Ethan, longtime friends, spend the day by the pool with their adult daughters, Nora and Tessa; playful teasing, lingering looks, and growing attraction gradually expose a mutual desire that none of them can easily ignore, as Tessa and Marcus and Nora and Ethan each find themselves drawn into private encounters, before the boundaries between the two pairs become even more complicated when all four finally confront the chemistry that has been building throughout the day and choose to embrace it together.