A standard parachuting drill turns deadly for Commander Kang San and Lieutenant Kim Biyeon when they land in a mysterious dimension filled with bloodthirsty monsters. The only help they have comes in the form of mysterious texts and rewards for completing missions. As the two soldiers push themselves to their limits to survive, they unlock mysterious abilities that are powerful beyond their control. Can they learn to harness these powers to stay alive and make it out of this twisted game? (Source: Tapas) Note: Chapter count includes a prologue.