In the futuristic world of Mundus where cyborgs and robots peacefully coexist with humans, life has been peaceful for the last few decades. However, that isn't true for everyone. Elise Rose, 18 years old, daughter of a rich politician, has lived her whole life as a spoiled child. Lately, her father has been targeted by rebel groups. Tenebrae Arctus, 22 years old, a renowned mercenary living in the slums, has been hired to assist the rebels in causing havoc in the city governed by Elise's father. What does fate has in store for these two characters living in two different sides of the world?