After getting his sister devoured by a dragon and losing all their supplies in a failed dungeon raid, Ratos and his party is determined to save his sister before she get digested. Completely broke and having to resort to eating monsters as food, they meet a dwarf who will introduce them to the world of dungeon meshi - Delicious cuisines made from ingredients such as the flesh of giant bats, walking mushroom, or even screaming mandrakes.