Bar Code

Meshet is a fine small town. A good school, good housing, everyone knows everyone. Everyone also has a bar code tattoo on their chest.
11-year-old Harmony's family members, her mother and grandmother constantly speak about a group, the Js. At least, that's what they're named as in Meshet to the elders. To speak of them around younger ones, the group is simply referred to as "them" or "they". Harmony wonders about the black lines on her chest all the time, but always gets shut down by her mother. She is told to never speak of them.
Then one day, the big black striped cars drive down the highway towards Meshet. Harmony's mother notices first, and she sounds the siren.