The rich merchant Lui Ming and a his old opponent Yeung Wai fight for everything for years. This time they compete for first to be grandpa! Yeung is going have a grandson from his son Alex and daughter in law Shan. Lui therefore threat his grandnephew couple Scallop and Snowy who live off his money to have baby, or will cut off all financial supports. Lui also hire the Super Star midwife Gong San to supervise and urge Scallop and Snowy. The couple’s life turns upside down, but recalls their romantic passion of the beginning of love…

马来西亚富商雷鸣（黄百鸣 饰）与死对头杨亚伟（曾志伟 饰）二人多年来斗生斗死，这次要斗快抱孙！ 　　雷鸣得知杨亚伟正期待儿子Alex（林德信 饰）与儿媳珊珊（吴千语 饰）诞下男孙，怒不可遏，就要挟二世祖侄孙雷带子（郑中基 饰）与侄孙媳妇雪儿（薛凯琪 饰）传宗接代，否则停止二人的生活资金。更重金礼聘天王级催生陪月婆宫三（吴君如 饰）严格监管，虽然起初令二人夫妻生活翻天覆地，但却间接重拾了夫妻间久违了的激情和浪漫，展开了活色生香的“生育的进击”。雷鸣确诊患有老年痴呆，为了圆其心愿，雪儿假装大肚，并向有孕在身的黛黛（熊黛林 饰）和秀波（于波 饰）夫妇求助，欲借其子瞒过叔公。不料想生产当日，杨亚伟出现，众人精心编造的弥天大谎眼看就要拆穿······

馬來西亞富商雷鳴（黃百鳴飾）與死對頭楊亞偉（曾志偉飾）二人多年來鬥生鬥死，這次要鬥快抱孫！ 雷鳴得知楊亞偉正期待兒子Alex（林德信飾）與兒媳珊珊（吳千語飾）誕下男孫，怒不可遏，就要挾二世祖侄孫雷帶子（鄭中基飾）與侄孫媳婦雪兒（薛凱琪飾）傳宗接代，否則停止二人的生活資金。 更重金禮聘天王級催生陪月婆宮三（吳君如飾）嚴格監管，雖然起初令二人夫妻生活翻天覆地，但卻間接重拾了夫妻間久違了的激情和浪漫，展開了活 ​​色生香的“生育的進擊”。 雷鳴確診患有老年癡呆，為了圓其心願，雪兒假裝大肚，並向有孕在身的黛黛（熊黛林飾）和秀波（於波飾）夫婦求助，欲藉其子瞞過叔公。 不料想生產當日，楊亞偉出現，眾人精心編造的彌天大謊眼看就要拆穿····