In Amsterdam - in the time before the legalisation of some drugs and the following growth of competition on the market - takes place a war between the Italian and Chinese mafia because of the control of the heroin market.
Three robbers who have just robbed a gas station flee into the zoo. But in their haste, they lose the note telling them where they hid the money. The note is found by two children who help take care of the animals in their spare time... This is the beginning of an exciting adventure, in which the children track down the crooks. In a wild chase through the zoo, the animals also make themselves heard, and the children receive help from an unexpected source!
