When six members of another Chapter of the Sinner’s MC want to come home to Boston, one of them is looking for a member of his family. His younger sister was taken when she was six years old.
Iceman, Peaches, Hawk and Leon all receive a train flattened penny in hand delivered letters. They all come together to figure out what these pennies mean, and what the four of them are brought together for. It all started twenty years ago and all four of them know the killer, they just have to figure out who he is and why he targeted them.