HD Schenk is a maker--an inventor, someone who builds cool stuff. He's got a plan for the summer: he'll build his own computer and enter it in the county fair. Then everyone will know who he is and what he can do.

To earn enough money for the parts he'll need, HD has promised to clear out his uncle's overflowing basement. No big deal, right? But there's more in that basement than HD bargained for. On his first trip down there, a voice only he can hear starts talking to him. About...sauerkraut?

Who knew the ghost of his great-great-grandmother was haunting an old pickling crock? She's got a grand plan, too. She wants HD to help make her famous recipe for sauerkraut and enter it in the county fair so that she can be declared pickle queen.

After some initial shock, HD is willing enough to help. This ghost is family, after all. But only HD can really see and hear his Oma, which is going to make it hard for her to win on her own...