A slight but atmospheric and effective French TV movie that in some ways recalls Jean Rollin's funereal THE IRON ROSE. Young Parisians Theodore (Pio Marmaï, IN YOUR HANDS) and Anna (LA BELLE PERSONNE's Agathe Bonitzer, daughter of director Sophie Fillières [IF YOU DON'T, I WILL] and screenwriter Pascal Bonitzer [VA SAVOIR]) meet at a party and impulsively hop the fence of the Parc des Buttes Chaumont for a one night stand. A landmark of historical import sporting an artificial lake, a grotto, a waterfall, a suicide bridge, and a hanging bridge, the park is also believed by esotericists to be a sight of immense energy emanating from a sealed off chamber beneath the ground. What starts off as a game becomes an addiction as the couple meet nightly at the park and depart at dawn while the viewer observes the daily (and nightly) visitors to the park - including a vagrant (Fabrice Adde, THE REVENANT) dwelling in the grotto while writing a tome on eco-psychology - in the present and in the past (via film footage from the beginning of last century) and also hear a case history of a man who underwent a psychological withdrawal of a sort after a change in his routine of passing through the park on the way to his job for over thirty years. Just as the atmosphere of the park influences the mysterious bent of their relationship, so too does the park take on a more sinister aspect to them as their relationship isolates them from the outside world: Theodore starts experiencing asthma attacks only during the day and Anna stops visiting her mother and concerned sister (Sarah Le Picard, ALIYAH). A trip to the seaside and an attempt at functioning like a normal couple offers temporary respite but one of them is drawn fatally back to the park.