The ship Icarus makes a  jump through space in search of a new energy source that can lead humanity in colonising planets beyond their system and their galaxy,in this search they are people who want to achieve the expansion of humankind and others that are driven by their own goals and desires

It has been a hectic week for Marjorie Valora Antoinette, a noble who lives in the Kingdom of Hamtalin. First, she meets a half-demon and goes to a tour around the Magic Academy. Then, she finds out her elder sister is about to marry someone they never even met.

However, 'hectic' soon turns into 'the worst' when the whole Hamtalin gets burned down by the so-called Revolution Army. She is forced to hide in the Magic Academy, and with the help of that half-demon and some other friends she made, she promises to avenge her family.

All in all, it's a bit surprising to find out that the soul of the archdemon Dominic rests inside her.