A building lost in the midst of a 5 000 hectare park, that's the equivalent of the surface of Paris, Chambord is the castle of all superlatives. Having required nearly 220,000 tonnes of stone to build, the Chateau de Chambord, in the Loir-et-Cher department, is an architectural gem. 156 metres of facade, it has more than 70 staircases, 282 fireplaces and 426 rooms. The castle commissioned by Francis 1st in the 16th century is also the most mysterious. The majestic monument has its share of mysteries: identity of its architect, influence of the Florentine painter Leonardo da Vinci in its design, location in the middle of marshes in the heart of the forest and even longevity because it has survived through time without being damaged since the beginning of its construction in September 1519.

Sea battles in the morning and gladiator fights in the afternoon with wild beasts magically appearing in the arena? A subterranean archaeologist investigates tunnels to see how the Colosseum could be flooded; and architects, engineers, and builders construct a lift and trap door system to attempt the release of a wolf into the most famous amphitheater in the world for the first time in 1500 years.

On October 30, 2017, the body of 29-year-old Alexia Daval was found in a wood near her home in the Gray area of Haute-Saône. The young woman was strangled to death; her body was partially charred. Two days earlier, her husband, Jonathann Daval, 32, had reported her disappearance while jogging. After three months of investigation, he confessed to be the author of the murder. This documentary retraces minute by minute the custody of Jonathann Daval. A tense, intense and uncertain camera session, told by the gendarmes themselves.