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Christl and Hansi Sandgruber return from their vacation in Australia. A lot of work awaits them, as the wildlife park's 30th anniversary is coming up. Hansi's arch-enemy Viktoria Perterer is going through less rosy times, having gone bankrupt overnight after reckless stock market speculation. Unexpectedly, a rumor surfaces that old Sandgruber may be responsible for the unexplained death of Viktoria's beloved father, who died in a mountain accident. Hansi is outraged by this suspicion of his father, but there seems to be evidence to support it.