On Lunar New Year’s Eve, the Gang of Glans leader, Ah Shun, announces that he will pass on his position to his second brother, Ah You. The impulsive elder brother, Ah Ming, and the young master, Michael, are dissatisfied with this decision. They decide to cum-control Ah You’s confidant, Xiao Yan, and force him to mix an aphrodisiac into Ah You’s drink, secretly plotting to usurp the position. Ah You ends up having sex with Michael that night under a mix of coaxing and threats, and signs a consent form relinquishing his claim to the leadership. Amidst the whirlpool of power and betrayal, a storm is about to erupt in the Gang of Glans ... 角頭：大龜頭／叔姪互操淫新年 龜頭幫老大阿順（石巴朝 飾）在除夕夜宣佈將幫主之位傳給二弟阿佑（言嘉佑 飾），衝動的大弟阿明（仔仔 飾）和少主麥可（Swang 飾）對此心生不滿，決定控射阿佑的親信小彥（小彥 飾），並逼其在阿佑的酒中摻入淫慾合歡丸，暗中密謀篡位。服下春藥後的阿佑，當晚在麥可半哄半威脅下和他做了愛，並簽下放棄繼承同意書。權力與背叛的漩渦中，龜頭幫內部危機四伏，風暴一觸即發！