Pipo, a dangerous killer, has struck again. He has just committed his sixth murder.

As usual, he signed his crime by painting his young victim's face a clown. With the police investigation stalled, Chief Inspector Jacquet considers asking for help from his former colleague, Henri Bolo. A bon vivant, Bolo left the force on a whim after ten years of loyal service. Despite Jacquet's insistence, Bolo stubbornly refuses to don his old uniform. He changes his mind when Jessica, his charming neighbor, shares her fears of becoming the next victim of the elusive Pipo...