Twelve-year-old Marco humors his sister by going to the basement to see the "tunnel" she has found. The adventure that follows lasts twenty-three years and includes strange creatures, a giant swing, and a singularity that acts as a passport to many worlds. 'When Marco's little sister, Lily, tells him about the strange lights in the basement, he thinks she's imagining things. But it doesn't take long for his deep curiosity to lead them through the bizarre hole in the basement wall and into another world. This curious fantasy will spark readers' imaginations.' - Publishers Weekly.