Allan Wang is a policeman who has been searching for his parents' murderer after they were killed when he was young. He is known to be tough and just towards everyone. Due to his parents' passing, he promised himself to capture and end every criminal he can. He never felt happiness, only anger, determination and regret. Yet everything changed after meeting the stubborn and mysterious Jeren Xiao, who just suddenly appeared in front of him and begun pestering him every single day. Jeren kept saying that he will make Allan submit to him but can annoyance really turn to love?