Murderous ego

“What is that? Some kind of sweatshirt or something. It's horrible what people will just throw into the water!”

The problem is, the sweatshirt isn't empty. It's being worn by a man whose body is floating lifelessly on the surface of the Elbe river as it flows through the royal town of Nymburk. For Captain Přibyl and Lieutenant Dvořák, this marks the beginning of a new case. They must find out whether the drowned man got into the river on his own, or if someone helped him in...

And if so, who, and most importantly, why?