Katy, Zia and Luca have come for a sleepover at Cassie’s house. Luca is excited to show them his new telescope, but they can’t see any stars — the glow from the houses and streetlights is too bright. A debate starts, because Zia sleeps with the light on but the others don’t. They decide a night-time adventure would be the perfect way to prove to Zia that the dark isn’t scary. Imagining the telescope is a portal into a night-time world, they find themselves in open countryside where they watch the nocturnal goings on of a host of night-time creatures. But when they meet an owl with a broken body-clock, they learn that something is out of sync. Helping the mixed-up owl un-mix itself, the four friends and Thunder set out to rebalance the ecosystem.