Zhang Guihua has the special ability to turn blood into gems. Because her son Wang Cheng is busy with work, he hires a caregiver Li Si to take care of her, and the two gradually become a couple. After Li Si discovered Zhang Guihua's abilities, he began to abuse her in order to obtain the gems. He drew blood and scratched her to obtain the gems. He also teamed up with his lover Wang Dayong to intensify the abuse. Zhang Guihua tried to ask Wang Cheng for help many times, but was blocked by Li Si. When Wang Cheng brought his daughter Tiantian to visit, Tiantian noticed that her grandma was abnormal and secretly left behind a miniature camera and voice recorder. Wang Cheng gradually discovered that something was wrong with Li Si. The nursing home informed Zhang Guihua that he was severely anemic. He began to suspect, but he was still deceived by Li Si's lies, and the truth was still covered up.
