The Yau's brothers are a trio of scammers who make punishing baddies their mission. A misunderstanding leads them to fellow con artists the Lui's sisters, and they join hands to scam a notorious mob boss. Through a myriad of ingenious tricks and disguises, they bring the mobster to justice as romance blossoms swiftly—all's well that ends well.

This story is a collection of four love relationships: Geeky Hong (Michael Ning) who looks forward to romance bumps into Shirley (Shirley Chan); Rich kid Silver (Chloe So) who is socially anxious hires a rental boyfriend Jerome (Adam Pak); Chung (Anson Kong) and Zoe (Karena),a dysfunctional pair of social couple; and Ho (Edward Ma) an indecisive person meeting Tin Tin (Roxanne Tong), a nurse with polyamorous relationships. Following the through line in each story, they encounter unexpected obstacles in their relationships all set on the eve of Valentine's Day.

ICAC Investigator William Luk and JFIU Chief Inspector Lau Po-keung both hit a dead end in their investigation of a bribery case and a money laundering case. In the meantime, William Luk was suspended when model Eva Ng went to Inspector Kenny Ching of ICAC’s Internal Investigation Group L, to file a report against him for accepting a $12M bribe. Lau discovered Luk was set up and whoever framed Luk was connected to his case. He began to suspect the bank manager Thomson Yau was assisting a gangster, Wong Hoi-wo in money laundering activities. When Director Hong Liang of China’s Anti-Corruption & Bribery Bureau (ACBB) provided Lau with important intelligence, it became clear the money laundering activities were connected to a corrupted Vice-Ministerial Level cadre. To clear his name, William Luk put everything on the line…

Female business owner Ding is put in prison for fraud conspiracy. To fight for survival, she recruits Bo to fight against Sister Po for leadership in prison. Out of nowhere, recidivist Waan joins the battle too to reclaim her status.