In his past life, Zhang Anping was an abusive man who drank, gambled, and mistreated his wife, Zhao Lingyun. This led to Zhao Lingyun and their son drowning themselves in the river, causing the family to fall apart. After being reborn, Zhang Anping decides to turn his life around and change the tragic fate of his wife and son. Using his advanced knowledge of the future, he begins to exploit the potential of crayfish, leading his family out of poverty and into prosperity. At the same time, he takes revenge on the wrongdoers and, in the end, achieves a happy and fulfilling life.
