When the sky falls apart and plunges the land of Alibon into darkness, Bodder Finn must go to the edge of his world to find his way back home.

Bodder Finn, of Middle Spot Village in Alibon, is a very curious child. When his father travels to the remote coastal village of Light's Edge, Bodder jumps at the chance to join him, along with his sister Ailie and his best friend Olo. Bodder is keen to see the Shadow Rim: the band of grey that surrounds Alibon at the edge of the orb's light, before disappearing into the terrifying darkness of the Forever Night.

But Bodder gets more adventure than he bargained for when thunderous rocks fall from the sky, making waves that sweep him, Ailie and Olo out to sea on their small boat ... and plunging all of Alibon into darkness. With no light to guide them, the trio must survive the perils of the Forever Night and find their way home, without falling off the waterfall at the edge of the world ...