The staff of Svartlien are throwing an office party. Eva-Lena has suggested that this year's will be a masquerade party, much to Sven-Erik's disbelief. Meanwhile, Yngve has found a years-old skeleton which he strongly suspects of being Stor-Erik, the father of the Marklund brothers. Unfortunately, he appears to have been murdered and Yngve suspects Sven-Erik, whose hunting knife was found at the scene, for the crime...
—J. Rieper