William lost both his parents in a tragic accident. To escape and find some peace, he travels to Cannes. During his stay, he falls in love with Sophie, an aspiring fashion designer who works part-time as a waitress at his favorite restaurant.

One morning, William rescues a young girl from drowning in the ocean. The girl’s father, Simon, a wealthy businessman, invites William and Sophie to a lavish party at his hillside mansion. As a thank you for saving his daughter, Simon surprises William by offering him a job and a place to stay.

What initially seems like a decadent stay, full of luxury and abundance, quickly turns into a chaotic nightmare. Several people around Simon are attacked by a mysterious stranger in what appear to be acts of insanity. As William delves deeper into the events, he uncovers unimaginable secrets about Simon’s past.