Zhang Changsheng, a young man from the modern world, unexpectedly transmigrates to another realm and awakens a reincarnation system that allows him to accumulate life experiences and destiny across lifetimes. In his first life, he is born into a poor farming family. Drawing on his mature mind, he studies diligently, enters officialdom, and uses a marriage alliance to change his circumstances. He eventually rises to become a fifth-rank prefect, but in his old age, he willingly sacrifices his life to protect his family. When he opens his eyes again, he has been reborn into a family of scholars. He passes the imperial examinations at a young age, only to stumble upon a long-hidden secret about the Li imperial family's cultivation of immortality amid political intrigue at court. In his third life, he is reborn into a collateral branch of the imperial family, tests as possessing all five spiritual roots, and enters the Li clan's cultivation academy. Carrying the accumulated experience of several lifetimes and unresolved obsessions, he seizes opportunities from humble beginnings, overcomes tribulations, and finally embarks on the path of cultivating immortality in pursuit of eternal life.