Surena Lysrandra has left the remote countryside dojo of Beryl Gardinant to work as an adventurer in the royal capital of Bartrain. Armed with the swordsmanship she learned from Beryl, she rises through the ranks at an exceptional pace, aiming for the prestigious Blank Rank, the highest tier of adventurer that only a handful of people in the world have ever reached. Despite her rapid progress, the Blank Rank remains just out of reach.

Her path takes an unexpected turn when she accepts a monster subjugation request from Logan, a once-renowned adventurer now past his prime. During that mission she meets Nell, a young girl who dreams of becoming an adventurer but lacks the skill to defeat even a single goblin. Reluctantly taking Nell under her wing, Surena begins training her while continuing to tackle dangerous quests. Their bond deepens as they face together a cave infested with monstrous serpents and other life‑threatening challenges.

Surena’s own past is marked by hardship; she was saved by Beryl in her childhood and harbors deep, unspoken feelings for him. Now, driven by both her own ambition and the responsibility of mentoring Nell, she pushes herself to new heights. The manga traces her journey toward the pinnacle of the adventurer world, interweaving her growth with Nell’s development and the legacy of the master she strives to emulate.