L.A.G is an unknown space where humans use abilities or skills through awakening, monsters appear on each floor and room, and missions are given accordingly.

Lee Jeong Hyeok repeated death and life countless times in this mysterious space. However, in this life, he gained the ability to own unlimited passive skills and finally saw a tangible chance to escape this hellish place. Still, unlike what he has been through so far, he will not know an inch of the future as L.A.G continues to change. This is a desperate survival story in which no one can be trusted and the end is nowhere in sight.