The Sweet Valley Twins have a lot of work to do. Between Elizabeth's newspaper articles and Jessica's new celebrity cook book project, there's barely any time for anything else! When their friend Mary decides to help them both, the twins are relieved—but Mary seems more determined to help their mom around the house than them with their work!

Jessica is suspicious that Mary is more interested in Mrs.Wakefield being her new mom than in actually being friends with the twins, but Elizabeth isn't so sure. There has to be a reason why she'd rather be with the Wakefields than at home, right?