Igor (José María Yazpik) is a plumber stuck in a stagnant, emotionally stifling marriage with Flora (Cecilia Suárez), who desperately wants a child to save their union. While working on a repair job, Igor meets Pina (Irene Azuela), a divorced single mother struggling to manage her troubled young son, Lorenzo (Hayden Meyenberg). An immediate, intense physical attraction ignites between Igor and Pina. As winter drags on, their obsessive desire drives them into a series of clandestine sexual encounters, threatening to completely disrupt their family lives, obligations, and psychological stability.