After four years without hearing from his former intern, Patrice gets a phone call from Hervé, who has run into financial difficulties. Patrice, a kind-hearted person, opens his home to Hervé and his companion Pauline.

Patrice discovers that his reunion with his former intern is not just a social visit. He's shocked to hear that Hervé has gone bankrupt.

So far, Hervé and Pauline are getting on well with Patrice, their gracious host, who took pity on them. However, Pauline is starting to show signs of dissatisfaction.

Yvette is disturbed by Pauline's hostile and suspicious behavior. What was she doing rummaging through Patrice's drawers?

Patrice's watch has gone missing, and he suspects Yvette for the theft, thanks to Pauline's subtle hints.

Patrice arrives home earlier than expected and catches Pauline and Hervé redhanded. Panic sets in and things get out of control.

Patrice has been bound and gagged in his room for two days. Luckily, when Yvette arrives at his front door to pick up her paycheck, she senses that something is wrong.

After Yvette reaches Patrice's home to return his keys, she senses that something has gone terribly wrong and takes a look inside through a window before she goes in. What she finds terrifies her.