In an attempt to help his friend Marcos with his impotence, Jaime sets up him up with another friend Josita. But the sex date fails, and so he comes in to help. What first appears to be just another sexual experience for all three evolves to a full romantic relationship.
In human sexuality, a threesome is "a sexual interaction between three people whereby at least one engages in physical sexual behaviour with both the other individuals". While the term threesome typically refers to sexual activity involving three participants, it has at times been used to refer to a long-term domestic relationship, such as polyamory or a ménage à trois.