A family on a tropical holiday discovers that the secluded beach where they are relaxing for a few hours is somehow causing them to age rapidly, reducing their entire lives into a single day. The family consists of a married couple on the brink of separating, their young son and daughter, and the husband's mother. As they investigate their strange and frightening situation, their bodies undergo decades of aging within hours, heightening their personal anguishes and forcing them to reevaluate their lives.

Other guests at the resort are drawn to the mysterious beach, including a surgeon with a volatile personality, a psychologically disturbed woman accompanied by her elderly mother and her young daughter, and a rapper known as Mid-Sized Sedan. As the beachgoers attempt to understand their predicament and find a way off the sandy trap, they are confounded by the bizarre temporal effects and physiological changes. Unexplained occurrences compound their horror as they grapple with the terrifying reality that they may not escape this place or the inevitable progression of time.