A story about a woman from China who forges her way to Japan by pretending to be someone's wife. When the man is to marry his fiance, he finds out that he is married (someone forged their way into the registry). Now Nakai Kiichi tries to do what he can to make sure the woman tells the truth and admit to authorities that he is not married.

《弄假成真》讲的是一个大陆女孩与假结婚的日本丈夫经过无数周折，最后假戏真作的喜剧故事。王菲在剧中饰演的大陆女孩林菲(译音)一心想进军国际时装设计界，为了得到在日本的居留权，她用旁门左道的手法，跟素未谋面的铃悬彰(中井贵一饰)假结婚，但彰却懵然不知。当彰计划跟富家女杉野惠美(仲间由纪惠饰) 结婚时，才突然从户籍上发现自己已经结了婚。于是他立即找到林菲，要求与她解除婚姻关系，但林菲却坚决反对。彰无奈，只好每天去劝林菲跟他离婚。然而随着时间的推移，彰由想跟林菲离婚，变成每天都期待见到她。