After ten years abroad, Catherine returns to Luxembourg to catch up with her daughter Alba, brought up by Catherine’s mother Elisabeth.
Alba is cold and distant with this stranger showing up unexpectedly in her life, and so is Elisabeth, keen to keep her protégée to herself.
One day, Catherine cannot take it anymore. She kidnaps Alba and takes her on a trip to a lake up North. An unsettling journey into the puzzling world of motherly love begins, only to find out that sometimes the true opponent is yourself.