The mafia boss is smitten by the detective

He is a guy who rules the underworld. Everyone fears him, no one dares to go against his orders. His world was black and white. Nothing except power mattered to him, that was before he met her. She came tumbling into his life like a big ball of color. She filled his world with warmth but they could never be together. Their relationship could hurt one of them. She was a secret spy who worked for the FBI and he was the king of the black market. He was her target, she had been sent to distroy him.