No. of episodes: 30
Genre: Crime, Investigation, Police, Legal
Native title: 逆天奇案
Original network: TVB
The drama is set in the race between the police force and a secret mastermind that plots the killing spree of the Flying Tigers unit. Hui Jun Sen (Ruco Chan) is a capable player under the Drug Investigation Unit (known as 0記) but he has always wanted to switch to the Flying Tiger unit.

Before his journey begins, the killing spree occurs and almost everyone in the operation died, including his mentor. He embarks on the journey to investigate the mastermind.
Team A and Team B
When Hui Jen Sen was accepted to the Flying Tiger unit, Hon Dak Lok aka Nic Sir (Ben Wong) was transferred to the Drug Investigation unit to take over from him. To investigate who is the real mastermind and culprit that orchestrate the ‘kill tigers’, Hui Jen Sen held his plans to move and decided to stay in the Drug Investigation unit.
From the desired partner, the multiple interfere of methods to work caused the friction between Nic and Sen that they became competitive teams.
Love triangle
Sen and his girlfriend Wing Ma Wing Yan (Rosina Lam) has been together for almost their whole life, even bought a house together. Wing is a police officer under the Criminal Intelligence Bureau (CIB) unit, she signs up to be a police because of Sen.
Just when their relationship seems perfect, the ‘kill tigers’ investigation put their wedding plans on hold and Anna Cheung Hei (Crystal Fung) stepped into their relationship and it became complicated.

Kill tiger
Sen was ordered by his superior not to investigate on the ‘kill tiger’ case but he did not really bother and went to do it during his free time. He met Anna who is the sponsored child of his Flying Tiger’s mentor. Anna is a white hacker that is trying her best to find out who is the mastermind of the operation through the dark web.

Toothless dragons
Marco Ngai Chi Lok (Jonathan Cheung) is the son of the late CEO and founder of an empire, he appears to be useless and only knows how to game. Together, he and his wife Rachel Yau Lai (Moon Lau) announced a new idol group based on e-sports and did not bother about the main business.
His uncle Ngai Dong Hoi (Li Shing Cheong) and cousin Calvin Ngai (Bond Chan Siu Pong) wanted to be the sole owner of the empire but that is when Marco strikes back and reveal his scheming and smart side.
Ngai Empire

All the leads and clues that were discovered by Anna, Sen, and later Nic, were all pointing in one direction: the Ngai empire. That is when they start to investigate more and dig deeper, not knowing that everything they are doing and including the clues that received are all planned by Marco and Rachel.
Will they discover the real truth behind the kill tiger case? What will happen to Sen and Wing after Anna stepped into the relationship.