Anna, a young adult, but child at heart, sees an advert which says that there's a 10% discount if you use the Blijdoorp zoo app to buy the tickets to the zoo.
So, she downloads the app and buys the tickets there, because she wants to save money, and she hasn't been to the zoo in a long time.
Once she is at the zoo, she opens up the app and sees on the zoo news that one of the animals food was stolen, and that there is a reward for the people who find it, but she doesn't know how to help, so she continues with her zoo trip.
Later on, she gets a notification on her phone, asking to help one of the starving animals and she decides to help. So, the app gives her a list of suspects, who might know something about the thief.
With the list of suspects Ana goes and asks the animals for hints. They all give her small bits of info once she does a task for them (like take a photo, give a compliment or make a drawing).
Finally, once she has got enough hints from the animals, Anna reads through the zoo animals info section and checks which animal might match the criteria.