22-year-old Claudia lives alone in a big city in Mexico. One night, she ends up in the emergency room with signs of appendicitis. There she meets Martha, lying on the bed next to her. 46-year-old Martha has 4 children and endless lust for life, in spite of her illness. Moved by the lonely young woman, Martha invites Claudia to come and live with her when she leaves the hospital. At first, Claudia is bewildered by the somewhat chaotic organisation of the household, but soon she finds her place in the tribe. And while Martha is getting weaker, Claudia's bond with each member of the family gets stronger day by day.