Paris, 1960. André Merlaux is hired as a trainee at the French secret service under the seasoned eye of several elite agents and a formidable colonel.

Moulinier and Jacquard cause a diplomatic incident while trying to capture a high-value target. Merlaux meets the enchanting Sophie.

When an African state demands independence, Merlaux gets his first big assignment and discovers a passion for politics.

On a mission to Moscow with Merlaux, Calot stirs up trouble with the CIA. Marie-Jo's upcoming promotion creates a mini-crisis at the office.

While the senior agents compete for the role of assistant director, Merlaux tries to figure out what Sophie means by the term 'modern woman.'

Moulinier, Jacquard and Calot go on strike to protest the loss of a bonus. Barred from seeing Sophie, Merlaux dives into his work and uncovers a plot.

After discovering that Merlaux is still seeing Sophie, the Colonel sets a trap for him under the guise of a high-stakes solo mission.

Sent to Algiers to intercept a terrorist, Moulinier and the others go to extremes to wrap up the mission and make it to a rugby match.

Determined to flush out the mole in the secret service, Moïse borrows a lie detector from Mossad, which immediately puts the Colonel on edge.

The hunt for the mole awakens Calot's paranoia, the Colonel discovers just how much Moïse knows about his past, and Merlaux opens up to Sophie.

Determined to get rid of Merlaux, the Colonel sends him to Algiers to stake out the mole, all the while plotting a devious surprise.