Stefan doesn't share Marie's optimism that Konstantantin, not even being the biological father, will stand by pregnant Jenny, as the overprotected brat does so far. Stress mounts as the opening of the forest experience center approaches, but it may have to be called off when the illegal waste dumping Stefan's new dog helps discover is found contaminated with Hanta virus. That's transmitted by rodents, and the seniors are just desperately trying to get rid of a mouse in the youth hostel.
—KGF Vissers