Keep an Eye Out

During the opening credits, a man in swimming trunks conducts a classical music orchestra in a clearing. Seeing the gendarmes in the distance, he tries to escape.

Finally, he is arrested and taken to the police station. In a large office, Commissaire Buron, after having had a telephone discussion, continues the questioning of the man who is seated in front of him, named Fugain, without allowing him to take a break to eat. Considered the prime suspect, Fugain discovered a man bathed in his blood outside his home. He searched the pockets of the corpse before calling for help, which surprised Buron who insisted on resuming the interrogation.

Buron goes out for a few moments to talk with his son and takes the opportunity to eat a hot dog. Meanwhile, Philippe, a novice one-eyed policeman, is tasked with monitoring Fugain. Philippe agrees to strike up a conversation and wants to show Fugain his police badge. He stumbles over an open drawer and falls dead, his one eye pierced by a square he held in his hand. Fugain, panicked, hides the body in a cupboard and quickly wipes away the traces of blood.

Buron returns and continues the interrogation. According to her testimony, Fugain's neighbor says she saw him leave her home seven times during the night. Watching the closet, Fugain explains in detail what he did during the night. Buron listens to him while smoking. As smoke comes out of his right side, he explains that he has a hole in his chest.

A little later, Philippe's wife announces to Buron that she is pregnant and is looking for her husband. Fugain lies and says he left because of a stomach ache. Like her husband, she makes it a habit to punctuate her sentences with "That's why", which annoys Buron.

During the interrogation, Fugain's memories mingle with reality. He sees Philippe, with the square planted in his eye, appear in his memories and interact with him. A little later, Fugain also sees Philippe's wife. He tells her that he will meet her and her husband a few days later during his interrogation and that Philippe will die accidentally.

Later, Fugain complains of being hungry. Buron, annoyed to see Fugain complaining, tells him that he too was very hungry for three days when his helicopter crashed on a desert island. Fugain sees Buron on the beach, which surprises Buron, not seeing anything. He ends up giving Fugain an oyster that a colleague has brought him. Fugain, having never eaten an oyster before, crunches the shell instead of swallowing it.

During Fugain's last memory, Buron appears in his apartment and interacts with him. After hearing screams, they leave the apartment and Buron notices the strange resemblance between Fugain's spy neighbor and one of his colleagues. Once outside, Buron asks Fugain to reconstruct the scene where he discovers the victim's body.

Back to the reality, Champonin, a colleague of Buron, brings the forensic report: the man found dead by Fugain was the victim of a "digestive hemorrhage". It's an accident and therefore Fugain expects to be released. Before leaving the room, Champonin finds an eye on the ground and deduces that it is Philippe's.

Fugain tries to explain himself but at the same time, the curtain opens: the police station is in fact the stage of a theater. The audience stands up and applauds, the characters salute. Moreover, Philippe, still alive, comes out of the closet and takes off his disguise; he is not one-eyed. They are all actors, except Fugain who believed he was really suspected of murder. They go to have dinner together in a brewery, evoke their acting and the first critics which fall.

Leaving the restaurant, Fugain, still confused, thanks Buron for this experience. Buron regains his seriousness and handcuffs Fugain, announcing that the interrogation will resume in the morning. Fugain is brought back to the police station and Buron returns home.

In a post-credits scene, at the theater, the audience watches a lowered curtain.

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