Minus eighteen

In Sweden, at the pier of the city of Helsingborg, the car of the director of a large IT company flies into the sea at full speed. Fabian Risk manages to establish that this person did not die during drowning: he was killed two months earlier, after which the body was stored in a freezer at a temperature of minus eighteen degrees. It turns out that during these two months, many people saw the deceased millionaire, although he was dead all this time. Soon, several similar crimes become known.
Meanwhile, in Denmark, Dunya Hugor encounters criminals of a completely different kind. Several people have fun by killing homeless people at night, filming it, and then posting it on the Internet.
These two cases turn out to be connected. But how exactly? Will Dunya and Fabian be able to hold the criminals accountable?