He is an iron-blooded god of war codenamed "Dragon Tooth" in the parallel world. He was seriously injured due to the turbulence of time and space, so he hid in a high-end community and became an ordinary security guard. He discovered that "he" in this world was a complete scumbag, who was coldly and violently violent towards his wife - a face that was exactly the same as that of his lost love. When "himself" died unexpectedly, he decided to take over the important task of protecting this broken family as a stranger. From a silent security guard to a powerful "distant cousin", he built an invisible wall to protect her from open and secret attacks, but when she gradually fell in love with him, he fell into a fatal whirlpool of identity and emotion. When the enemies of the two worlds are approaching at the same time, he must make a choice: return to the throne, or be trapped in this world of fireworks forever for her.
