Grace, a girl who lost her parents and even her family, has held only one thing in her heart for 13 years: revenge. And then there’s Ares, who lost everything to the same enemy. Seeking revenge, Grace proposes a fake relationship with him, and the two enter into a cold pact. However, the feelings that sprout in the flames of revenge gradually blossom into love, and she fears that these feelings will become an obstacle to her revenge. Caught between revenge and love, what choice will these two make as they race towards the end?