编自台湾原创小说《灵魂的约定》，跨越年龄、身份的三世情缘。香港演员王智骞、范麒智饰演69岁老人魂穿20岁孙子与室友共谱出一段命运错综交织的特别情缘。 发生了一场意外夏茶和自己的孙子夏泽方交换灵魂，为了不让孙子的生活停摆，阿公只好顶着他的身躯继续上学，一名69岁阿公的灵魂困在一名20岁少年的身体里，为了要把身体还给孙子的夏茶和邻居兼同学兼室友叶海渊一起行动，逐渐发现两人之间命定的关系。
天光（郭晋安 饰）是重案组的CID，为人刚直不阿黑白分明。在追查一宗连环杀人案时，发现疑凶竟是二十年前从父亲手上逃脱的犯人。天光父亲大河（许绍雄 饰）是一名资质平庸的警察，且粗心大意不思上进，不仅让罪犯逃走，更是死在妓女床上，让天光母子蒙受巨大屈辱。以写作实况小说知名的作家高珊（陈慧珊 饰）此次亦追踪着天光手上的案件，二人对案件的不同理解造成摩擦，纷纷竞逐真相。 一日，天光发现父亲的旧电话神奇响起，对方声称自己是警察，只是所说所讲都停留在八十年代。细问起才发现那竟是二十年前的父亲大河！二人合作无间，跨越两个时空，共同追查真凶。
This 7-year series chronicled the adventures of the Impossible Mission Taskforce (IMF), a team of government spies and specialists who were assigned "impossible missions" by the unseen "Secretary". Although the cast varied over the years, the main characters included The Team Leader (Dan Briggs the first season, then Jim Phelps the other six), The Techno-Wizard (Barney Collier), The Strongman (Willy Armitage), The Master of Disguise (first Rollin Hand, then The Amazing Paris), and The Femme Fatale (Cinnamon Carter, Casey, Dana Lambert, Mimi Davis). The series is best known for its opening mission assignment (conducted by a pre-recorded tape), the theme composed by Lalo Schifrin, the leader's selection of mission agents from a dossier, the opening briefing, the intricate use of disguises and a typical "mask pulloff" scene near the end of most episodes, and the relative lack of characterization of the characters.
Jim Phelps is the new leader of the Impossible Missions Force, with no explanation, or even reference made, about the departure of predecessor Dan Briggs. First up for Phelps is a mission involving the drug trade. Cresnik and Walters have cornered the heroin market and sell it at a handsome profit to gangs around the world. Phelps devises an operation which will drive a wedge between the heroin dealers and their customers.
