Caught escaping a police raid on a local nightclub, petty thief Eddy is presented with an ultimatum: face prison or assume the unlikely identity of a mathematics instructor at a nearby high school.

The unsettling atmosphere of a mandatory safety exercise, compounded by Eddy’s clandestine activities after dark, plunged the school into disarray, drawing unwanted attention to him—and unexpectedly bringing him nearer to Tiphaine.

During a school excursion to Normandy, Eddy made an awkward effort to gather DNA samples for Lucie, and a misguided attempt to charm Tiphaine ignited considerable debate.

The school's sudden lockdown has drawn intense media scrutiny, but amidst the chaos, Eddy is determined to identify a suspected informant within the teaching staff—a search that ignites a deeply politicized demonstration.

Across France, Professor Fish became an unexpected sensation, while Lucie worked to secure a meeting with Sagirov’s intermediary and Eddy asserted his position during a live broadcast on local television.

A figure from years gone by offers startling insights and unsettling questions regarding the matter, as Eddy arranges a conference with teachers to allow Lucie the opportunity to search for answers.

Touched by a heartfelt letter, Tiphaine’s resolve began to soften. However, a careless falsehood quickly ignited suspicion, and Lucie drove Eddy relentlessly onward, testing him to his utmost in their effort to maintain the operation.

The school grounds are encircled by snipers as the graduating class begins their final examinations. Amidst rising fear, Eddy disobeys orders, intervening to shield a student—a decision that puts him directly in harm’s way.