At opposite ends of the Heavenly River, the Northern and Southern Emperors, rulers of life and death, make a wager during a game of strategy. To test the power of love, they cast the mystical Beidou Orb into the mortal realm, where it must face three lifetimes of trials and tribulations.

After losing her husband and daughter in an explosion, full-time housewife Wen Xin discovers the ability to reverse time. With a twelve-day time gap, she races against fate, making relentless attempts to save her family.

A celestial spirit named A Hua is sent to infiltrate the demon realm to investigate a potential war. Gaining the trust of Demon Lord Ya Si, she uncovers the truth but becomes entangled in political schemes and personal ties.

Chen Xiang, a screenwriter, is pulled into her unfinished script where characters are trapped in a three-episode loop. Her arrival pushes the story forward, but she unexpectedly falls into a comedic romance with the demon king fated to die by her hand.

Su Jinli, a headstrong princess, is transported into a game world where danger, betrayal, and hidden rules govern her fate. As assassins close in and the system itself turns unstable, she joins forces with Yun Lang to uncover the truth behind the game and find a way back to reality.