Park ranger Angelica seeks the help of her dog handler ex-boyfriend, Viktor, to search for a missing woman in a dangerous nature reserve in Sweden. The search is complicated by a disturbing myth about the Cave Banshee, a vengeful spirit from the Nordic folklore that once lured miners to their deaths in the reserve's treacherous caves. As they delve deeper into the forest, Viktor starts to question his own sanity and whether the rumored Banshee is more than just a myth. To make matters worse, Angelica and Viktor share a painful history with the haunted place. Viktor must now confront his troubled past and work together with Angelica to survive the night and unravel the mystery behind the woman's disappearance.

Father & Son go up to the croft in the country on Barnens Ö. As they always did, through the years, always together. But this weekend something happens that puts the relationship on edge. It is the hottest day of the summer and once the spark is lit, the fire cannot be stopped. From the flames springs the memory of a young boy, in his world father is still immortal. From the ashes something else is born, a truth no one wants to face.