Fifteen days until the apocalypse. That’s what 29-year-old office worker Hoyeong Lee discovers after taking a mysterious medicine he received for saving a goblin from a bear trap. The pill grants him an incredible power — the ability to level up faster — and even comes with a strategy guide for survival. But when the world is suddenly forced into groups to climb the deadly Apocalypse Tower, Hoyeong must work together with his team if they’re to reach the top alive. Will his new ability lead them to salvation… or will it be the very thing that seals their doom?