One is a cold female killer with a complicated life experience, and the other is a cheerful female student who has just graduated and is obsessed with time-travel novels. Two girls with different identities living in different worlds, but a pair of bracelets opened a rift in time and space and came to a dynasty that had never existed in history. Is it a coincidence? Or is it fate? ... The gears of fate began to reverse, and the lives of the two began to change. The intervention of various people made the seemingly peaceful life have undercurrents. Time and time again, he was caught in the danger of conspiracy but could not retreat, let alone retreat. He worked step by step and intrigues, just to protect the one he loved. When the truth emerges, how should they choose?