After dying in a truck accident, Ren is reincarnated into another world and receives the special ability 【Detection Skill】 as a bonus. Soon after arriving, he's attacked by a slime but manages to narrowly avoid a fatal blow thanks to a strange sensation—realizing it's the power of his new skill. However, lacking strength and combat abilities, Ren feels uneasy about his chances of survival.

Amidst his struggles, he gets caught up in a noble family's internal dispute and, by a stroke of luck, ends up with a large sum of money. Determined to survive in this new world despite having zero combat skills, Ren teams up with Valburga, a former female knight, and Kurt, a gluttonous companion. Together, they set their sights on a dungeon, dreaming of striking it rich…