One day, a symbol that represents an explosion appeared on the necks of a bunch of couples who were anonymously nominated. Once any of them cross beyond the “dangerous line”… one of them will explode physically. Schemes, murder and hatred have all happened on them ever since. On that day, they have not only turned love into hatred, they even drew their swords against each other… which is not supposed to happen… a young man named Ning Yuan has been drawn into this cruel game one day, how is he going to save his love if he is an [emotionless person]?