Ali Ferguson has just moved into Lever Tower with his mum. It's not long before he meets Caitlin & the Alsatian dog she looks after Falcon who doesn't take too kindly to being walked on a lead. Caitlin introduces Ali to her best friend Gez & together the three set out to discover firstly why the foxes have disappeared from the area secondly why the owls have appeared & thirdly why Miss Osborne has it seems vanished... And how exactly her disappearance is related to the previous two. With the help of his friends & significantly Caitlin's dad Ali & his mum begin to feel comfortable & happy in their new life without Ali's dad.