Ez(Esmeralda), Jordan, and Matt(Matthew) are childhood friends who reunite in their hometown after three years apart. While catching up, they decide to try the "25th Hour", a popular fad that swept through the town’s youth years ago and having been too young to participate during its peak, the trio sees this as the perfect opportunity to try it out together.

However, this turned out to be far from the harmless thrill they expected it to be. They are pulled into a journey that shatters their understanding of reality and unearths a dark secret involving someone who is close to all three of them. What began as a childhood curiosity quickly turns into a desperate confrontation with a truth of the 25th hour that will change their lives forever.