Exit 8

While in the subway, The Lost Man receives a call from his ex-girlfriend informing him that she is pregnant with his child and asking him what to do. Unsure on whether he's fit to be a father after having failed to defend a woman being berated by another passenger for her crying baby, he is overcome with an asthma attack. He soon finds himself in a deserted, endlessly looping corridor. Through trial and error and a set of instructions on a wall, The Lost Man realizes he needs to reach Exit 8 by turning back whenever the corridor has an anomaly and moving forward when there is none. Anomalies can range from a door having a doorknob where previously there was none, to blood raining from the ceiling. Any mistake returns him to Exit 0, resetting his progress.

Eventually, The Lost Man meets The Boy, a small child that had been following The Walking Man, an unresponsive entity The Lost Man sees walking down the corridor in every loop. Through a flashback, it is revealed that The Walking Man was once similarly lost, but became a part of the loop after abandoning The Boy for a false Exit 8. Although initially silent, The Boy proves highly perceptive and with his help The Lost Man makes steady progress. The Boy gradually opens up to The Lost Man, confessing he ran away from his mother, and gives him a hermit crab shell for good luck.

After reaching Exit 7, the corridor is suddenly flooded and The Lost Man saves The Boy, holding him above the water and comforting him before he himself is swept away. The Boy is shown at a beach with his parents, The Lost Man and his girlfriend. After regaining consciousness, The Boy turns the corner to Exit 8. The Lost Man appears a short while later, confirming that this is the real Exit 8 by seeing The Boy's shell on the floor. Back in the real world, he calls his girlfriend, promising to meet her at the hospital.