Santiago and Eugenio, lifelong business partners, share an unspoken understanding, deep affection, and dependence on each other. When Eugenio vanishes without a trace, Santiago is initially oblivious but soon realizes the truth from Eugenio's distraught wife, Laura. Together, they embark on a journey to find him, only to discover they prefer each other's company to uncovering his whereabouts.

The Mystery of Happiness
A lifelong bond between two men, Santiago and Eugenio, is tested when Eugenio suddenly disappears, leaving behind only unanswered questions and a desperate Santiago searching for the truth.