The Red Thread Immortal clan has a thunder catastrophe every hundred years. If there is no suitable person to bear the thunder during the thunder tribulation, the failure rate will increase by 80%. The miserable Liu Yu has practiced for hundreds of years but has not met the one she loves. When she was distressed, her old master connected her red thread with the red thread of a mortal with an ugly knot, and asked her to go down to earth to protect this mortal who was regarded as Tang Monk's flesh by monsters. But why didn't anyone tell her that this mortal was so difficult to deal with? If she had known this, she might as well have been struck to death by the thunder...