Four children - Mari, Sadu, Olav and Anton form a secret society to play hide-and seek games invented by Mari's grandfather, a professor at the university. When the city is attacked by a mysterious poison which turns adults into children our gang embarks on a quest for the antidote.

• Nafta
• Olivia Viikant
• Arabella Antons
• Hugo Soosaar
• Karl Jakob Vibur
• Mirtel Pohla
• Evelin Võigemast
• Ott Aardam
• Tiit Lilleorg