Three thousand years ago, the son of the dragon had constant entanglements with the fairy in the fairy world. Three thousand years later, the two reincarnated and met again.Cheng Qi (played by Deng Chaoyuan), the son of the richest man in Lincheng, was originally a sickly pretty boy. A Lin (played by Tu Zhiying), a kind and cheeky little elf, sacrificed his inner elixir to save Cheng Qi's life, but was accidentally digested by Cheng Qi and lost.Ah Lin, the inner elixir, lost all his magic power and could only pester Cheng Qi to take full responsibility for himself.The two have very different personalities and dislike each other, but in the process of finding a way to separate the inner elixir, they gradually fall in love, and once again start a romantic and fantasy love story.