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Han Taewan, a killing machine meticulously trained by the military. On the day he returns from a deployment mission, he learns of the death of his beloved lover, Kong Jeyoon. Driven to find the one responsible for his death, Han Taewan dives into the mercenary market. Never having failed a single mission, he earns the nickname “Big Money” and becomes the most expensive mercenary in existence. Approaching JH Corporation, the black market where Kong Jeyoon’s final mission took place, Han Taewan receives the contract he’s been waiting for. However, as he examines the special conditions written in the contract for what seems like a simple security job, doubts begin to arise. “Well then, since...