The journey of the ancestors' gifts

"The Nguyen kids are going on vacation! It's their first time in Vietnam and they are staying in Grandma N??i's childhood home, so they should be excited. As soon as the siblings enter the house, though, something doesn't feel right. Why is the door to the ancestors' room always closed? And why can't they connect with Grandma N??i using their gifts, the way they can at home?"--Provided by publisher.