In the dim glow of a subway platform, The Lost Man [Kazunari Ninomiya] witnesses a man scolding a mother for her crying baby, a moment that presses hard on his sense of responsibility just as his girlfriend reveals she’s pregnant, asking him what he’ll do. A stark moment of doubt washes over him, and a sudden asthma attack forces him to confront whether he’s fit to become a father. The scene blurs and then drifts into a surreal, deserted corridor that loops on itself, a place where reality seems to stretch and snap at the edges of fear and resolve.
On the wall, a set of instructions appears, and The Lost Man discovers that progress depends on a strange rule: he must reach Exit 8 by turning back whenever the corridor presents an anomaly, and move forward when it remains still. Any misstep, any deviation from this fragile pattern, sends him all the way back to Exit 0, resetting the fragile progress he’s managed to claw out of the endless maze. The tension intensifies with each loop, as doors gain or lose their knobs, and rain of blood from the ceiling punctuates the bizarre math of survival.
In one loop, he encounters The Boy [Naru Asanuma], a small child who has been quietly shadowing The Walking Man [Yamato Kôchi], an unresponsive figure who seems to drift through every iteration of the corridor. Through a spare, haunting flashback, it’s revealed that The Walking Man was once lost too, but chose a false Exit 8, abandoning The Boy and becoming part of the loop itself. The Boy, initially reticent, proves perceptive and steadfast, slowly building trust with The Lost Man. He shares the truth of his own fear—he ran away from his mother—and offers a small hermit crab shell as a talisman of luck.
As they navigate deeper into the maze, the corridor turns suddenly dark, and a swarm of bald rats with human body parts bursts from the vents, their cries rising to a dreadful crescendo. The two protagonists sprint for safety, the claustrophobic walls closing in as the rats’ eerie wails echo behind them.
When they reach Exit 6, a blaring siren cuts through the air and the scene shifts to floodwaters that surge through the corridor. The Lost Man acts with quick courage, lifting The Boy above the rising water and keeping him safe as he himself is swept away by the tide. In a stark reversal of reality, The Boy finds himself on a beach, with his parents nearby, while The Lost Man and his girlfriend regain consciousness elsewhere. The Beach scene is fleeting yet visceral, a dreamlike waypoint that offers a glimmer of what could be real. Afterward, The Boy returns to the labyrinth, stepping toward Exit 8 once more, now sure of the path.
Back in the real world, The Lost Man materializes in a moment of clarity and calls his girlfriend, promising to meet her at the hospital. He steps onto a crowded subway car, and as the space fills with the hum of strangers, he hears the same baby’s cry and the same sharp admonition from a passerby about the mother’s child. This time, he gathers the resolve he’s been seeking and confronts the rude man, choosing to stand up for the vulnerable moment by moment, just as he has learned to navigate the echoes of the maze.
Throughout this ascent from doubt to action, the story threads a quiet, persistent message: that fatherhood, responsibility, and connection can emerge from the most disorienting loops of fear, memory, and choice. The journey tests not only the nerves but the heart, and it asks whether courage can be found in the very corridors that threaten to erase it.
