"Explores the life of one lighthouse as it beams its message out to sea through shifting seasons, changeable weather, and the tenure of its final keeper."-- On the highest rock of a tiny island at the edge of the world stands a lighthouse. From dusk to dawn, the lighthouse beams. Hello! ...Hello! ...Hello! Sending its light out to sea, guiding the ships on their way. Outside, the wind blows, the fog rolls in, and icebergs drift by. Inside, a keeper...

Olivia Clark describes her family's journey as they move from their home in Missouri to the Oregon Territory while following the Oregon Trail through her diary.