Gunkri, a young goblin with aspirations of greatness, sets a trap for a group of heroes who have managed to reach the most dangerous floor of the Dungeon, the 10th floor.
The day of trials has arrived and Gunkri, the goblin, will do everything to demonstrate that he deserves to be on the 10th floor of the Dungeon, even if that involves facing monsters much bigger and stronger than him.
Uri, the paladin, along with his elf companion, Vendelina, face two repulsive monsters, a Juju Zombie and a Yuan-ti, in a battle that turns out to be more disgusting than thought and not exactly on the side that one would expect.
Gunkri the goblin and Archigrog the orc will have a difficult time against Kolzby, a peculiar kobold who will warn them for causing chaos and who may not allow them to pass the trials.
In the tavern, dwarves, elves, humans and heroes of all races drink and sing their exploits in battle, but Uri Naste, the paladin, raises the tone by singing a song that will unleash the heroes' thirst for blood towards the monsters.
Gunkri and Archigrog have been sent to the Phantom Fortress on the 2nd floor of the Dungeon to catch a psychopathic rabbit as the primary target of the trials, but what they will find instead could put their lives and their souls at risk.
With Archigrog gone, Gunkri finds the Psycho Rabbit, but he will have to fight him with Argus, a peculiar human hero whose natural state is to be drunk.
Paladin Uri Naste keeps a secret that is related to a lonely well that is only guarded by his slave monster, a Water Myrmidon. What mysteries does that well hide?
Gunkri and Archigrog return to Kolzby without the rabbit but not empty-handed. They have brought her a "surprise" that it is very likely that she does not like it at all, especially because of the message he brings to her.
Gunkri, Archigrog and Argus guided by Kolzby carefully navigate a shortcut in the Dungeon that should take them faster to the 10th floor, but faster does not mean less dangerous.
Gunkri, Archigrog, Argus and Kolzby disguised as other monsters are still trying to reach the 10th floor without being discovered along the way. But a big, asthmatic ogre hinders their plans.
Finally. Gunkri and Argus make it to the tenth floor but apparently something went wrong with the spell that teleported them because Archigrog and Kolzby are nowhere to be found.
Archigrog and Kolzby have also been teleported to the 10th floor, but searching for Gunkri and Argus they find someone they wish they had never run into.
Gunkri, Archigrog and Kolzby are questioned for their trespassing on the 10th floor and for bringing a hero with them. Their lives have never been at such risk.
Gunkri, Archigrog, Kolzby, Argus, Calaverius, Calaverias, Infernicus and Fueguiticus try to prevent Tenebro from escaping but it is not easy to face the most powerful monster in the Dungeon. A battle where anything can happen.
Gunkri, Archigrog, Kolzby and Argus are awarded by Infernicus thanks to their great collaboration with the Dungeon. It is a happy day for some but not so much for others.
