When he was young and ignorant, Lu Cheng heard about the butterfly effect, but he didn't take it seriously. It was not until later that he began to travel back to the past through dreams. Obviously he just dreamed of having an extra drink at a friend's party the day before yesterday. When he woke up, the roommate he had planned to travel with had been poisoned to death. Obviously he just dreamed about high school classes and missed his youth. When he woke up, his happy deskmate was beaten to death before the college entrance examination. Obviously he just dreamed of going back to his hometown to pick a handful of loquats. When he woke up, the aunt next door who was hosting his daughter's wedding banquet was actually hacked to death. Later, Lu Cheng became afraid. He finally dreamed of going back to ancient times and became the Nine-Five Supreme Being. However, he sat on the dragon throne and did not dare to move. As a result, when he woke up, he actually caused the demise of a dynasty. He finally realized that so many people were only one person away from death. He, the innocent murderer, must find out the truth and turn the tide.