The biggest porn star of the 1970s must reclaim his mojo in the 80s by saving all male kind, fighting his way to the heart of a conspiracy to sell meat pumped full of estrogen to emasculate men.

年夜唛（刘青云 饰）与克仔（周文健 饰）及Bowie（林保怡 饰）三个死党，均染上赌马癖好，操纵赌马往制造胡想与成绩。而年夜唛幸有何May（吴倩莲 饰）的鼓动勉励与提点，尚不至恋马烂赌之徒。一次，Bowie找到一部德律风偷听器，怂勇年夜唛与克仔在马场宿舍偷听练马师贴士，成果博得万多元，而年夜唛便把所赢金钱尽交阿May保管。为赢钱他们重施故伎，年夜唛更想藉此博得妻子本，好向阿May求婚，谁料练马师坠马而弄致三军尽墨，成果年夜唛不单拖欠贵利，更遭到外父臭骂，又令母亲掉看。面临如许的窘境，年夜唛会再重投马场一赌？仍是悔改改过，