After Richard Moser is killed by a mental patient who also kills himself after looking into Rex's sad eyes in the last episode, he is replaced by Alex Brandtner, but Rex is desperate, refuses to eat, and wants to be near Moser's house. Alex decides to help him.
A man is murdered by two men and is thrown into the Danube. Böck and Hollerer investigate this case without Rex and Moser. Moser died in the line of duty while investigating the last case, and Rex is grieving over him. Alexander Brandtner replaces Moser in the team, buys his house, and becomes Rex's new owner.