A friend in his cigar club asks Antoine to visit Rene Rouquet, a retired postal worker who has found a rolled-up canvas in his apartment. As the apartment once belonged to Cezanne, Rouquet is convinced he's discovered a treasure. But when Antoine arrives at the apartment, he finds Rene dead, the canvas missing, and a mysterious art history professor standing over the body. When the painting is finally recovered, the mystery only deepens. The brushwork and color all point to Cezanne. But who is the smiling woman in the painting? She is definitely not the dour Madame Cezanne. Who killed Rene? Who stole the painting? And what will they do to get it back?"