Eleven-year-old Micah has no interest in moving out of her grandfather's house. She loves living with Poppop and their shared hobby of driving around rich neighborhoods to find treasures in others' trash. To avoid packing, Micah goes for a bike ride and ends up at Finch House, the decrepit Victorian that Poppop says is Off Limits. Except when she gets there, it's all fixed up and there's a boy named Theo in the front yard. Surely that means Finch House isn't Off Limits anymore? But when Poppop finds her there, Micah is only met with his disappointment.

By the next day, Poppop is nowhere to be found. After searching everywhere, Micah's instincts lead her back to Finch House. But once Theo invites her inside, Micah realizes she can't leave. And that, with its strange whispers and deep-dark shadows, Finch House isn't just a house...it's alive.

Can Micah find a way to convince the house to let her go? Or will she be forced to stay in Finch House forever?