Trees are not just places where colourful birds live… They are also hiding places for children who want to let their imagination run free. The minute his father gave him permission to use the big oak tree behind the house to build a treehouse, Rubix hurried off to give the good news to his friends Pasco and Talia.

These three friends share a love of adventure and a desire to use their superpowers to help others. After building their secret hideaway in the tree themselves, they decide to install a surveillance system throughout the city so they can help people who need it. In their treehouse, they install an old computer rescued from Rubix’s basement. Rubix, who is very good with computers, programmed it to allow our three little heroes to watch for anyone in the city who might need their help.

Every day, after they finish their homework, the members of the Little Heroes Club climb up the rope ladder and enter their secret hideaway. After slipping into their costumes, they boot up the computer and survey the city. At the slightest signal, they are ready to go search for a lost animal or even to take action during a natural disaster.

When everything is quiet, the three friends spend their time playing marbles or ball, drawing or helping Rubix with his scientific experiments. Pasco likes to find ways to add an artistic touch while Talia insists on testing his inventions.