"Solo Leveling" follows Sung Jin-woo, a weak E-rank Hunter who gets a rare ability to level up through a mysterious system after a near-death experience in a double dungeon. He uses this system to become incredibly powerful, becoming the sole player in a world where "Hunters" battle monsters that appear through portals. The World: The story is set in a world where portals (dungeons) appear, allowing monsters from other dimensions to enter. Humans with special abilities, known as Hunters, are tasked with battling these monsters. Sung Jin-woo: Initially, Jin-woo is the weakest Hunter, often ridiculed and underestimated. He's known for his low rank and lack of skills. The Double Dungeon: Jin-woo and his party enter a double dungeon, a dangerous and unexpected occurrence, and he nearly dies. The System: After surviving the dungeon, Jin-woo discovers the "System," a magical program that allows him to level up by completing quests. He is the only one who can level up through this system. Transformation: Jin-woo uses the System to rapidly increase his strength and skills, transforming from a weak Hunter into a powerful and feared figure. Journey of Self-Improvement: Jin-woo's journey involves battling various enemies, both human and monster, to uncover the secrets of the dungeons and the true source of his powers. He faces challenges and sacrifices as he grows stronger, often putting others before himself.