The Viennese detective children Biggi, Patrick and Luke find a key in dragon form, and their curiosity is aroused. They realize that the sinister Lady Q is interested in opening the legendary moon palace and find the elixir which is believed that promises eternal youth. The Tigers must prevent that Lady Q enters into possession of the priceless liquid.
| Directing | Peter Gersina | Director |
| Writing | Thomas Brezina | Writer |
| Writing | Peter Gersina | Writer |