After her parents die in a mysterious highway crash, Tessa Morgan is left to care for her younger siblings while trying to rebuild their lives in the quiet town of Willow Creek, Ontario. But when Tessa discovers a hidden metal box in her father's closet containing a newspaper clipping about a bank robbery from eighteen years ago and a strange coin marked 18, she realizes her parents were hiding something dangerous. Soon, another coin appears on her doorstep. This one marked 17. Across the city, a new series of bank robberies begins, each crime scene marked by a numbered coin counting down from eighteen. With the help of Detective Lawson and the courage of her siblings Ethan and Lily, Tessa begins uncovering the truth behind a robbery that was never solved. But someone else is following the same trail. And when the final coin appears.

the truth behind The Weight of Eighteen may destroy everything.