The sharpest knife of the film crew, Gu Yanluo, number 734, accidentally rescued Qin Wuwu who was being hunted by his family during a mission. One is a killer who is accustomed to cold rules, and the other is an arrogant person in power who is burdened with a family conspiracy. They should be two parallel lines that will never intersect, but they are forced to become entangled because of the intersection on this rainy night.
The Qin family's relentless pursuit, the film crew's deadly pursuit, and the truth behind their parents' deaths... When the layers of fog were peeled back, they found that each other had become each other's only light. From testing each other to relying on life and death, two people who don't know how to love learn to trust in the light of swords and guard each other's warmth on the edge of darkness.
"You save me once, and I will protect you for the rest of my life." This bond that began with an accident will eventually forge the most hard-core love and redemption in blood and fire.
