Jonathan, suspected of committing a hate crime, is the target of a Mr. Big operation, a unique investigative method used by the police unit that creates elaborate ploys to get their target to confess to a major crime. Jeff manages to gain his trust by playing a fearless criminal. Ana, the new recruit, wins Jonathan over at a crucial moment.

Louis Bernier, a compulsive gambler, is suspected of strangling a female dealer. The Mr. Big unit approaches Louis and devises a plot in which Jeff persuades the target to join a fake Gamblers Anonymous group chaired by Francis. Having money problems, Louis agrees to commit petty crimes with Jeff, who promises him a future within "The Organization." Ana, who is part of the support group, catches Louis's attention.

Louis, convinced that Ana is a police officer, is out of control. A change of plan is needed. Francis discovers the target's weakness and decides to use it to manipulate him. Jeff must deal with a personal situation with the mysterious Rose. Since Louis is a compulsive gambler, the team offers him a way to make money by organizing an underground poker tournament to get the suspect to meet "Mr. Big" to obtain his confession.

Following the disappearance of two children, two suspects are under surveillance by the Mr. Big unit. Is this the return of the "Verdun Maniac" who struck 10 years ago? Two parallel operations are launched to find the children safe and sound. Ana and Jeff turn pedophiles around the targets to advance the case. Ana makes a surprising discovery, and Jeff finds himself in a morbid situation.

The two targets are becoming increasingly paranoid, and the team must be as subtle as possible. Ana finds herself rooming with Éric and tries to get closer to Magalie. Jeff is deeply affected by the discovery of a victim from a previous investigation. He and the team plan a scheme to learn more about the pedophile ring. He and Francis become protective agents to win over the girl and discover the identity of the "uncle."

Manuel learns that confidential information about his double agents has been leaked. This information puts the members of the Mr. Big unit in grave danger. The suspect is discovered to be an unscrupulous RCMP officer. The target, Eugenie, is trying to make money off of this sensitive information. The team attempts to frame her with the help of a notorious criminal. Under pressure, it is tragically discovered that the woman has a difficult accomplice.

Ana, deeply shaken by the tragic end of a target, must confront her anger. The team tries to understand what happened. Jeff sees it as the work of a professional and goes to visit an old friend. Meanwhile, Rose receives a completely unexpected visitor. Jeff finds a new assistant for a mission. To help him, she confesses. Ana finds herself in a situation that puts her and the ongoing operation in danger.

A robbery orchestrated by three criminals escalates into a hostage situation at a jewelry store. Mr. Big's team has created this explosive scenario around a target suspected of committing a triple murder. Sidelined during this operation following her last intervention, Ana tries to consider her future. To force the suspect to reveal his true nature, the agents deliberately provoke his anger until the big reveal.

The team devises a scheme involving a man whose wife has mysteriously disappeared. This Mr. Big scenario unfolds in a funeral home belonging to the suspect: Sylvain Larochelle. For this scenario, Joëlle plays a new employee at the morgue, while Ana becomes the target's new love interest. Jeff, Sylvain's softball teammate, introduces him to Clément with the aim of offering him an illegal deal to force a confession.

A man radicalized against immigrants is the target of a Mr. Big operation. He is suspected of having murdered a family of newcomers. Jeff and Ana pose as far-right activists to get close to the suspect. But how will the team achieve their goal? Jeff also finds himself in a very difficult personal situation.