Sometime after the Gates appeared in this world, people were divided into two categories— [Users] and the [Regulars]. The Users are able to choose a [Class] as they awaken... But due to a momentary lapse of judgement, Choi Yikyung ended up choosing the worst of all classes, 'Necromancer'.

<The most shocking dungeon accident at the 'Tower of Spirits' , what caused it?>

Meanwhile, Yikyung finally manages to convince his Servant [Lackey] to pair up with him to go to the [Tower of Spirits] and comes face to face with the truth about the cause of the incident!

“I will do anything really... Please sign a contract with me and help me!”

—You will do anything...?

[Would you like to accept the ‘oath’ offered by ‘Seo Dawon’?]

―You will do your best to help me with my revenge. And I will do my best to save you whenever and wherever you are in danger. What do you say?

[The contract with the new Servant ‘Seo Dawon’ has begun.]

A thrilling contract revenge drama between Low-ranked 'Necromancer' Choi Yikyung and Ranker 'Mage' Seo Dawon!