Yeon-woo had a twin brother who disappeared five years ago. One day, a pocket watch left by his brother came back into his possession. Inside, he found a hidden diary which read, « By the time you hear this, I will already be dead… ». the Obelisk, the Tower of the Sun God, a world where many universes and dimensions intersect. In that world, his brother had been betrayed by climbing the tower. After learning the truth, Yeon-woo decided to climb the tower with her brother’s diary. Yeon-woo then went through the same ordeal as his younger brother and fought as an anonymous player. His goal? To defeat the Obelisk Tower and avenge his brother.