In his previous life, he was called a super agent of the National Security Bureau. During a mission, in order to cover the retreat of his companions, he resolutely pulled off the bomb on his body and died with the enemy. However, there is always a way, and he was reborn as a young man who sacrificed his life to save a child who fell into the water. He originally wanted to live an ordinary life in this life, but who would have thought that he would unintentionally cause endless troubles...