The Enchanted World of Brambly Hedge - The Secret Staircase: The Midwinter Festivities(1998)

Overview

Midwinter's Day is coming. Primrose and Wilfred are assigned to recite the Midwinter Poem, and they discover a secret staircase concealed in the attic and many old rooms within. They finally stumble down a secret tunnel making it in time for the Midwinter celebrations, but they keep the old rooms a secret.