Margus Paju

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.

A historical spy-thriller set in 1939 about an Estonian intelligence agent tasked with uncovering the Soviet double agent in their ranks.