Night hunting (SK)

The victim, a respected GP, is found in his bed suffocated

One hot June night, Detective Chief Inspector Erika Foster is called to a brutal murder. The victim, a respected medical practitioner, is found
in his bed, suffocated. His wrists are tied and his eyes are bulging
under a translucent bag, fastened just below the head.
A few days later, another man dies in similar circumstances and Erika, along with colleagues Peterson and Moss, suspect they are facing a serial killer. He watches his victims and waits for the right moment to strike. What do the two dead have in common?
Is there a secret in their past that might connect them? And what connects them to the killer?

Erika does everything she can to stop and catch the Night Hunter, although she again takes risks and gets into conflicts with her superiors. Plus, maybe the killer is starting to stalk her, too.