Tank (Ron Ng) and Strawberry (Huang Wanling) are salesmen of two insurance companies. Every day, the two people who live door to door will start a fierce battle for customers. Until one day, Strawberry took a leave and didn't come to work. Tank's empty heart made him realize that he didn't seem to hate each other as much as he thought. Xiaoxue (played by Wu Riyan) met a boy with braces, Ronaldo (played by Hins Cheung), in a coffee shop and laughed at him. Who knew that he was splashed with water and his mobile phone was broken. Xiaoxue, who changed her mobile phone, unexpectedly received a text message from a stranger. After a while, the two became friends. Who is the real identity of this person? Ah V (played by Yeung Sau-hui) and the head teacher Mr. Yang (played by Liu Haolong) gradually developed an ambiguous relationship. In the end, the two crossed the moral boundary. After that, Mr. Yang began to alienate Ah V, which made the latter decide to retaliate against this unfaithful man.