The story of Alberto, a father who, since his divorce, has spent little time with his children Lucía and Federico. One thunderous morning, all three set off for some thermal springs. The holiday is to be short and they want to make the best of it, especially the enthusiastic Alberto who hopes that nothing will foil his plans. But the thermal baths are closed until further notice and, as his children give his reproachful looks, Albert reacts in a split second and flies off the handle. Soon, everybody's nerves are on edge, as the humidity becomes increasingly sticky. Rain continues to fall, as the house rented by Alberto seems to be shrinking by the hour…