Robblekin Mazer, or also called Rob is a young goblin from a peaceful tribe. His tribe only hunted for survival without bothering any other races. Everything changed when a group of adventurers massacred his village. With only a few survivors, he swore to get revenge. To get revenge, he is going to make his own dungeon. Digging the dungeon, building the walls, building traps, capturing prisoners, etc. Even recruiting monsters and beasts to attack anyone who dares to go inside. With this dungeon, he wants to create a big problem for the humans. He will get a lot of difficulties, to even build this dungeon. Is he going to be satisfied with revenge? What is going to happen?