It's the summer of 2005, and Marnie Winchester is in charge. That's right, her sister Winnie is out of town for a week and Marnie is officially the boss. It's everything she's always wanted.

Kind of.

If her teenaged daughter and her two cousins weren't getting into the wine...and if her sister wasn't belting out show tunes at the drop of a hat...and if her aunt Tillie wasn't threatening curses at every turn...things would be perfect.

That's a lot of "ifs," isn't it?

Marnie is planning the Winchester family's annual solstice celebration - and it's a lot of work - but the real work comes when niece Bay sees a ghost and Aunt Tillie declares war on her meddlesome great-nieces.

Marnie has to find a way to keep the solstice celebration on track - and no one is up to the task of helping. The curses are flying fast and furious, and Marnie is running out of time to help a forgetful ghost move on, find her missing magic supplies and prove she should've been the boss all along.