In an age when spiritual cultivation has declined, a bustling modern city becomes the setting for an extraordinary encounter. Li Mingyue, a young girl with terminal cancer, desperately climbs onto a rooftop, intending to end her life. Just then, a mysterious man dressed in purple, Xiao Fan, suddenly appears. An Immortal King from the immortal realm, Xiao Fan has descended to the mortal world to overcome a bottleneck in his cultivation. Carrying the Book of Fate, he bears the mission of helping those destined to cross his path. Facing a girl determined to die, Xiao Fan uses his immortal arts and red spiritual energy to eradicate her illness. Their encounter between the immortal and mortal worlds marks the beginning of a journey of redemption and rebirth across time and space. As modern urban life collides with the wondrous civilization of immortal cultivation, a fantastical story unfolds that touches the heart.