Kate shouldn't be here. Yet here she was, risking her mom's wrath, to come back to a house she can't remember. A house her estranged aunt lived in until her disappearance a year ago. A house her mom desperately tries to keep Kate from. But Kate can't resist the pull of the house as it draws her in and soon memories of a magical childhood summer spent with her aunt start to surface. Strange, impossible ones that can't be real and she can't explain. Seeking answers, she secretly moves into the house and discovers her aunt's hidden journal, locked away. Not sure what to expect, Kate begins to read and is soon thrust into worlds filled with doors and danger. Her world is further shaken when she finds out her family can move through doors only they can see. When a creature rips through the fabric in the sky above and threatens Kate, she is left shaken with the possibility that her aunt may be alive, held captive for information that could end all worlds, and Kate is the key to finding her.