In the drought-stricken ruins of Uxmal, Mexico, hydrologist Diego Cruz discovers an ancient Mayan water clock that triggers vivid visions when touched. What begins as scientific curiosity evolves into a profound journey as Diego partners with Amara, an indigenous rights activist with deeper connections to the site than she initially reveals. The water clock—housed in an overlooked chamber called Building B—proves to be the central node of an ingenious hydraulic network designed to activate only during specific environmental and astronomical alignments. Father Dario, a Catholic priest, attempts to control the clock's power, continuing centuries of Church suppression of its mysteries. As a convergence storm breaks the drought, the water clock fully activates, creating a mystical mist that allows Diego to experience multiple potential futures—from ecological collapse to cultural renaissance. In this nexus point where realities briefly coexist, Diego and his companions must choose which future will manifest.