Loki Familia has breached the halls of Knossos, a man-made underground labyrinth with nasty surprises lurking around every corner. Divided into several groups, the members have their hands full just trying to survive! Bloodied and battered, will Gareth, Finn, and the others be able to escape this living nightmare, or will Knossos be their final resting place?

Loki Familia's supposed beach vacation has taken a turn toward catastrophe with the appearance of demons from Tiona and Tione's past-the Kali Familia. The unexpected arrival of the Amazonians unhinges Tione, and both sisters must confront memories best forgotten. Before it becomes clear exactly why Kali and her brood have dropped in, tragedy strikes-Lefiya is kidnapped, and Tiona and Tione vanish in the uproar. The goddess Loki's wrath is a thing of horrors, but the Amazonian sisters' ire may just prove worse...

The clock stops for no one. Promises have come undone-Aiz could not kill the monster who wept in front of her while shielding Bell. For nights on end, those tears have haunted her, obscuring her reason to fight and guiding her to face Bell for the first time since their conflict... But they aren't the only ones joining hands across familias. With the dawn of the Knossos operation upon them, the patron gods tear down their differences. The adventurers march toward their fate with the Xenos by their side. For life, for death, and for the destiny of Orario, they hold their heads high, ready for war-failing to realize that the darkest of times is yet to come...

Deep in the dungeon, the rogue town of Rivira is under attack by a new breed of monsters and it's up to the adventurers to defend it! Luckily, some of Loki Familia's best have the situation well in hand. But when Aiz faces-off with Hashana's murderer, she has a personal score to settle as well - why does this murderer know "Aria"!? After an unsettling defeat, Aiz's desire to level-up and become "strong" burns inside her more than ever, pushing her challenges in the Dungeon to the extreme. So her request that Finn and the others leave her behind in the lower levels must be for her singular goal...right?

Locked in heated battles, Tiona and Tione face off against remnants of their poisonous past...With Aiz’s hands full opposing Ishtar Familia’s captain and Lefiya held hostage, the situation seems dire. But as Loki unravels the behind-the-scenes workings of Port Meren’s monster infestation, reinforcements arrive– Finn and the rest of the boys are itching for a tussle and ready to show Kali Familia just who they’re messing with!

Monsters. Fundamentally different from humans and beasts, these loathsome creatures make their homes underground. To Aiz, such beings only exist to be destroyed, so when they suddenly appear in Orario, she doesn’t hesitate to leap into action. As chaos erupts in the streets, Loki Familia rises to quell the onslaught, only to find Bell Cranell standing in its way. Bell seeks to protect the rampaging monster behind him, but in order to do so, he’ll have to go up against Aiz herself...

Aiz Wallenstein is the Sword Princess, one of the best fighters from the most powerful group in all of Orario, Loki Familia . She's consumed by one goal: become stronger. Together with her familia, Aiz departs on quests to some of the deepest floors of the dungeon, exploring and fighting the dangerous monsters born below. But when one expedition goes terribly wrong, will Aiz be strong enough to save her familia, or has all her work been for naught...?