St Grizzle's School for Girls, Ghosts and Runaway Grannies - St Grizzle's

When local schools are asked to make a film of the area, Dani and the rest of St Grizzle's set to work. But the boys at the village school are planning sabotage. With the help of Granny Viv, who is secretly residing in the school's tree house, they come up with the perfect video... But will Granny Viv be able to stay once the competition's over?