Two friends reunite after 16 years, but their lives have taken vastly different turns. Nacho and Marta, a seemingly perfect couple, struggle with infertility, while Denis and Carmen, a free-spirited duo, aim to open a restaurant. When Denis offers to be a surrogate for the couple, they must confront their own shortcomings and redefine what happiness means to them, even if it means breaking their own rules, as their pregnancy advances.