A typical North American family's lives change drastically when a distant relative moves in from another galaxy - Overlord, the 2nd-most wanted villain in the universe.

After twelve years of playing his favorite MMORPG game, Momonga logs in for the last time only to find himself transported into its world playing it indefinitely. Throughout his adventures, his avatar ascends to the title of Sorcerer King Ains Ooal Gown. Once prosperous but now on the brink of ruin, The Sacred Kingdom enjoyed years of peace after construction of an enormous wall protecting them from neighboring invasions. But, one day this comes to an end when the Demon Emperor Jaldabaoth arrives with an army of villainous demi-humans. Fearing invasion of their own lands, the neighboring territory of the Slane Theocracy is forced to beg their enemies at the Sorcerer Kingdom for help. Heeding the call, Momonga, now known as the Sorcerer King Ains Ooal Gown, rallies the Sorcerer Kingdom and its undead army to join the fight alongside the Sacred Kingdom and the Slane Theocracy in hopes to defeat the Demon Emperor.

The second recap film of season 1 of the anime TV series Overlord, covering episodes 8 to 13.

作品主要讲述了某天，一款掀起大热潮的VRMMORPG「YGGDRASIL」原本会停止一切服务，但即使过了结束时间，玩家也不会退出游戏，NPC也有了各自的思想。现实…

In the year 2138, virtual reality gaming is booming. Yggdrasil, a popular online game is quietly shut down one day. However, one player named Momonga decides to not log out. Momonga is then transformed into the image of a skeleton as "the most powerful wizard." The world continues to change, with non-player characters (NPCs) beginning to feel emotion. Having no parents, friends, or place in society, this ordinary young man Momonga then strives to take over the new world the game has become.

During World War II, a young man is called up and, with an increasing sense of foreboding, undertakes his army training ready for D-Day, June 6th, 1944.

France, June 1944. On the eve of D-Day, some American paratroopers fall behind enemy lines after their aircraft crashes while on a mission to destroy a radio tower in a small village near the beaches of Normandy. After reaching their target, the surviving paratroopers realise that, in addition to fighting the Nazi troops that patrol the village, they also must fight against something else.

时间为2138年。曾卷起一大风潮的虚拟现实体感型网络游戏《YGGDRASIL》即将迎来停服。玩家飞鼠在曾经以同伴和荣华自傲的根据地纳萨力克地下大坟墓，独自一人安静等待着那一刻。 但是，不料发生了“过了结束时间却还没有登出”的异常事态。NPC们开始以自己的意志行动，不止如此，纳萨力克之外展开了从未见过的异世界。飞鼠为了寻找过去的同伴，以公会名安兹·乌尔·恭自称，决定在异世界扬名立万。他与宣誓绝对忠诚的部下一同，向新的地域进军。

OVERLORD Ⅲ特别篇Q版动画

单行本第11卷同捆OAD。新作动画时长30分钟，守护者全员将全数出场。