Rude is an adventurer who makes a living by collecting medicinal herbs in dungeons filled with miasma, relying on his unique skill [Abnormal Status Nullification]. Because of this, other adventurers avoid him because he smells like miasma, and he cannot form a party, so he is derided as a miasma diver.

Then, a new labyrinth is discovered, and Rude is invited to join a party that needs him as a baggage carrier. In order to change the situation, he challenges the labyrinth. However, after encountering a powerful monster in the labyrinth, the adventurers who accompanied him betray Rude and abandoned him as a decoy...

After a life-or-death battle with the monster, he is injured, loses all his supplies, and is in a desperate situation. With the monster’s corpse lying before him, Rude tries to survive by gambling on the forbidden monster food...

The more he eats, the stronger he becomes - this is the start of an exciting gourmet adventure fantasy!