In a mysterious building named "Corridor", three strangers with different backgrounds—Lin Mo, an architecture student with rigorous logic, Su Qing, an art teacher with keen observation, and Old Zhou, a watchmaker skilled in mechanical disassembly—wake up simultaneously without any memories. They discover that there is no violence or bloodshed here, but it is filled with puzzles defying physical common sense and heavily nested spaces. Behind every door is a brand new secret room, and every puzzle seems to map a certain obsession deep within their hearts.