关（林家栋）任职收数员，为生计兼职代客泊车，其妻Rosa（梁咏琳）觉关没出息，遗下儿子一走了之。关因一次向青（黎耀祥）收数，结识了其姨仔可（袁洁莹），成了一对斗气冤家。关后转职地产经纪，没空照顾明，以为温柔体贴的王（梁咏琳）可当明的母亲，但终因性格不合而分开。其实，关在不知角觉中已爱上可... 另一方面，青与妻欣（关宝慧）因买屋问题而闹至分居，再加上青旧女友出现，二人终离婚收场。但此时，欣竟发现原来已怀有青的骨肉！究竟欣和青能否破镜重圆？关和可又能否发展下去？
The rights to reallyb's novel 'Roller Coaster' have been acquired by Motion Minds Entertainment! Casting auditions will begin soon.
As Leo's replacement Thomas Chamberlain arrives Nikki investigates the murders of Rachel Freedman, shot in the head, and her little autistic son Nathan, who was poisoned. Nikki rejects policewoman Anne Burchett's theory that Rachel killed them both but is perturbed when an impostor, claiming to be Rachel's sister, visits the morgue. At the same time the disfigured corpse of Eva Liron is discovered, killed with the same poison as Nathan. She had been the nanny to French hot shot footballer Isaac Dreyfus and was planning to blackmail him over a sex tape of them both. Jewish Isaac is a controversial figure due to his anti-Muslim sentiments but he denies ant part in the murders. Then another victim, Isaac's agent Mousa, is discovered dead.
