Twelve-year-old Henry York wakes up one night to find bits of plaster in his hair. Two knobs have broken through the wall above his bed and one of them is slowly turning...Henry scrapes the plaster off the wall and discovers 99 cupboards of all different sizes and shapes. Through one he can hear the sound of falling rain. Through another he sees a glowing room—with a man pacing back and forth! Henry soon understands that these are not just cupboards, but portals to other worlds.
Now, with his time at the farm drawing to a close, Henry makes a bold decision—he must go through the cupboards to find the truth about where he's from and who his parents are. Following that trail will take him from one world to another, and ultimately into direct conflict with the evil of Endor.
Unfortunately, Henry's discovery frees an ancient, undying witch, whose hunger for power would destroy every world connected to the cupboards—and every person whom Henry loves. Henry must seek out the legendary Chestnut King for help. Everything has a price, however, and the Chestnut King's desire may be as dangerous as the witch herself.