In a fantasy world where a guild system ranks adventurers, Gail Hamilton works as a specialist curse crafter, an artisan who creates items imbued with detrimental effects. After helping his party achieve the prestigious S-rank, Gail is abruptly dismissed on the grounds that he is not contributing enough and is holding the group back. Unbeknownst to his former teammates, the cursed goods Gail crafts are not the weak trinkets they assume; his creations possess power rivaling holy relics and legendary artifact-class equipment. Left to fend for himself and starting with few resources, Gail decides to operate as a solo adventurer, utilizing his unconventional and often creepy cursed items to make a living.

The story follows Gail as he establishes himself outside the traditional party structure, demonstrating that his abilities are far more valuable than his former colleagues realized. While adventurers typically rely on holy blessings and legendary gear, Gail proves that a well-placed curse can be equally effective in combat and problem-solving. His journey causes a sensation within the guild as his unique methods yield extraordinary results, forcing others to reconsider their prejudices against his craft.

As Gail progresses alone, he encounters a cast of supporting characters including Moira, a support magic user, and Princess Carla. Gail is characterized as a creator who initially suffers from low self-esteem due to being underestimated but gradually discovers the true value of his skills. The narrative explores themes of individuality and self-worth, showing that success does not require conformity to conventional power structures.

Recurring narrative arcs include the gradual decline of Gail’s former S-rank party, which begins to struggle without the hidden support his cursed equipment provided, as their gear fails and quests become unexpectedly dangerous. Gail also faces direct confrontations where his strategic use of curse mechanics is tested against elite opponents, revealing that his gear functions like high-level artifacts. A subplot involving a mysterious betrayer adds ongoing tension to the story. The series blends action and strategy-focused battles with comedic moments derived from the contrast between the suspicious appearance of Gail’s creations and their remarkable effectiveness.