Gentle, patient Bavarian policeman Barney Brunner soon starts regretting having agreed to merge his household -including duly skeptic preteen son Feddy - with his chaotic lover, workaholic social worker Hanna König -with teen brat Lia, who asks neither before inviting her hunky boyfriend Alkan in her bed. Hannah's mother Wilhelmine being hospitalized after a car crash, she volunteers to run her wedding agency, but finds it dangerously in debts and commandeers Barney's 'help' to save it. Barkeeper and bride client Jenny pawned the rings bought by groom Simon Riedel, an unsuspecting ministerial driver, who ignores her gambling addiction and semi-fraudulent first marriage. Hannah even drags her home, wrecking Barney's last hope of some privacy or quiet, even expects his legally dubious help for the thief.
The towns of Gschaid and Millsdorf are in a constant state of feuding with each other. Nevertheless Gschaid's Sebastian and Millsdorf's Susanne are married. In her husband's town Susanne has to put up with daily harassment by the locals, which also extends to her two children. Finally she moves back to her parents, alone. When the children, who long to find a magical crystal they believe has the power to reunite the family, get lost in a howling blizzard on the exposed mountain after bringing their mother her Christmas presents, both towns set up rescue missions.