Young and ambitious Captain Vivés has just been appointed group leader at the Grenoble Criminal Squad when Clara’s murder case lands on his desk. Vivés and his team investigate Clara’s complex life and relations, but what starts as a professional and methodical immersion into the victim’s life soon turns into a haunting obsession.

When a team of explorers ventures into the catacombs that lie beneath the streets of Paris, they uncover the dark secret that lies within this city of the dead.

Paris in the 1920s. Marguerite Dumont is a wealthy woman with a passion for music and the opera. For years, she has performed regularly for a circle of guests. But Marguerite sings tragically out of tune and no one has ever told her. Her husband and her close friends have always encouraged her in her illusions. Things become very complicated the day she gets it into her head to perform in front of a genuine public, at the Opera.

It all starts at daybreak, three young surfers on the raging seas. A few hours later, on the way home, an accident occurs. Now entirely hooked up to life-support in a hospital in Le Havre, Simon’s existence is little more than an illusion. Meanwhile, in Paris, a woman awaits the organ transplant that will give her a new lease on life.