After encountering a brief power outage at work, college student Sara Donovan might be allowing her imagination to run wild. The main vault in the Carlton Museum holds the Fire and Ice Exhibit, a collection of rare gems, including the Star of Midnight, a 175-carat diamond. Although all the stones are accounted for, Sara suspects the Star of Midnight was stolen and replaced with a fake.

While conducting her own investigation, what Sara uncovers is beyond even her wildest imagination: a coded message, papers with strange characters, and a mysterious set of numbers carved into an office wall. Despite dismissive historians and other experts, she is certain these clues point to a mysterious centuries-old legend.

Unfortunately, her colorful history of usually being right, but always being wrong, means she must solve the mystery to prove her theory.