An international group of young archaeology students is working on a dig on the island of Gotland, uncovering a Viking fortification dating back over a millennium. They are a fun-loving lot,
but the good vibe turns to horror when one of them, twenty-one-year-old Martina Flochten, disappears. Her body is found a short while later, naked, bled out, and hanging from a tree. And her
injuries indicate that she is the victim of a ritual killing. Inspector Anders Knutas and his team work feverishly to catch the killer, but soon there are more victims.
