A missing girl. Decades of silence. A secret too big to bury.

1987: It's late summer and a time of change when a 17-year-old girl leaves the local shopping centre in the sleepy town of Lowbridge and is never seen again. Her unsolved disappearance is never far from the town's memory. There's those who grew up in the shadow of her loss whose own lives were altered forever, and those who know more than they're saying.

It just takes an outsider to ask the right questions. 2018: Katherine Ashworth, shattered by the death of her daughter, moves to her husband's hometown. Searching for a way to pick up the pieces of her life, she joins the local historical society and becomes obsessed with the three-decades-old mystery.

As Katherine digs into that summer of 1987, she stumbles upon the trail of a second girl who vanished and was never missed because no one cared enough to see what was happening in plain sight. Her trail could lead right to Katherine's door.

In a town simmering with divisions and a cast of unforgettable characters, Lowbridge is a heart-wrenching mystery about the girls who are lost, the ones who are mourned and those who are forgotten.