Kom is an experienced and skilled bodyguard who is responsible for protecting a wealthy businessman with a very distinguished status. However, in an unexpected assassination, the wealthy businessman was shot and died. Kom fell into deep self-blame for this. Although the wealthy businessman's wife understood that Kom was not derelict in his duty but this tragic ending was inevitable, the wealthy businessman's son was unwilling to forgive Kom and fired him. Afterwards, this hot-blooded young master became the next target of assassination by his enemies. Fortunately, he escaped the killer's powerful firepower attack and stayed in the slums under an assumed name, gathering strength to avenge his dead family. In the process, Kom was also persistently looking for the young master's traces. In the end, the two of them cleared up their past grudges and joined forces to start looking for the real culprit together.