With their estranged Aunt Jan as their guardian, twelve-year-old twin brothers, Horace and Edgar Eerie, still cope with the unexpected death of their mother. On the day of their school detention, the boys each face different supernatural events that bring out unexpected abilities in them.

In 1692, Salem, in the midst of the witch trials, Hex is absorbing the abilities of other witches so he can enter the present world and rule over the Hidden Ones, Humans, and control all magic-and Mother Nature. But first he must collect the Four Seasons, totems that hold the seeds of each season. And he already has one!

With the help of their best friend, Horace and Edgar must travel back to 1692, Salem, and stop Hex. But dark family secrets are revealed and those secrets might destroy the brothers before they have the chance of saving their family, friends, and their future.