A modern man with low self-esteem and cowardice due to a damaged heart, experiences hangovers, false confessions, and sudden death on the most absurd April Fool's Day in life, and travels back to a farm boy with the same "damaged heart." With his half-baked knowledge of chemistry, he started by changing the fate of a family. He went through the loss of his childhood sweetheart, leaving his hometown, counterattacks in the imperial examinations, and bloody battles at the border, and finally discovered the mystery of his life experience - he was originally the eldest son of the Duke of Zhenguo, but he was exiled among the people due to a conspiracy. It took him a whole life to go from low self-esteem to self-consistency, from cowardice to fearlessness.
