Two weeks after her husband’s death, a chilling mystery begins for Inge Mulder: an anonymous bouquet of flowers arrives, followed by a series of unsettling gifts. Her grief turns to dread when police reveal she's been meticulously spied on, her every move watched from her own garden. Desperate for answers, Inge and her son, Robbert, decide to uncover who is lurking in the shadows. But their search for the truth quickly spirals into a desperate fight for survival. Robbert unexpectedly unearths the identity of a ruthless killer, placing his own life in immediate, terrifying danger. Now, a frantic race against time begins. Can Robbert warn his mother before the stalker closes in, and before their quest for answers becomes their final, fatal mistake?