There's a dog poo-traipsing intruder in the school and site manager Dave is determined to catch the culprit. Meanwhile, Mr Nasal attempts to keep his relationship with Miss Spray a secret, and Mr Konnundrum's in trouble... with his mum.

For this year's school photo, Dockbridge High decided to hire one of the world's best photographers... but none of them were available so they got Blake Papaway instead. As the staff and pupils prepare, Blake goes missing. Will they find him in time?