To celebrate her daughter Cille 18th birthday, her mother Nanna, pays for her and her friend Lea to go on a cruise. At first the trip is filled with laughter, dancing, and drinks, but on the first night Cille is found on the upper decks of the ship alone with no underwear and bruises. Claiming she has no memory of what happened but sure she was sexually assaulted; Nanna becomes determined to find out the truth and find the attacker.
The film very much rests on the shoulders of Trine Dyrholm who plays Nanna the mother desperately trying to find answers. Dyrholm is captivating in her role, acting as our guide through a parent’s nightmare. She very easily slips into the irresponsible mother who just wants to celebrate with her daughter to being on a mission she knows she might fail; she carries the film and does it well. But despite the great performance, the film does, at first, feel like a paint by numbers story. Young girls acts recklessly, its discovered she was raped, but she is blamed for putting herself in the position, mother takes action to find out the truth. It is the last story beat where Birthday Girl picks and becomes far more intriguing to watch.
Full review over at Filmhounds.