With the kids away, three married couples get together for an evening of relaxation and laughs. But as the liquor flows and secrets are revealed, trust is tested and boundaries are broken. It's Just Sex is a comedic and thought-provoking look at fidelity, lust, communication, and what it really takes for a marriage to survive and thrive. By the end of the evening, what should have been just an innocent party turns into an event that changes all three relationships forever.