Wei Mingxiao and Pei Lingxuan accidentally traveled through time and belonged to the opposing camps of immortals and demons. With a mobile phone and years of tacit understanding, the two secretly communicated with each other, supported each other, and counterattacked all the way to become the leader and demon king of the Immortal Alliance. Faced with the suspicion and strife within the Immortal Sect, the power disputes in the Demonic Way, and the Shen family's conspiracy, they joined forces to break the situation, use the secret realm experience to improve their strength, stir up the storm with the "All Things Heavenly Palace", and finally liquidate their enemies, and jointly create a new pattern of symbiosis between the immortal and demon worlds.