Pinkerton is the coolest school on earth, and Cosmo Soper is its coolest teacher. Totally eccentric, his lessons are as much fun as they are enthralling! But Pinkerton is under threat from the wicked plots of evil teacher, Miss Macbeth, so four kids form a secret network to protect their school and save their world. Armed with gadgets such as the super-sonic-reactor skateboard, bullet-proof chewing gum or laughing gas pop-corn they will do anything to save their little world. Their code name? Invisible Network of Kids, or INK for short!