John and Mary have lived with desolating grief and the agony of uncertainty for the past ten years. Their only child, Clare, ran away from home when she was fourteen and no trace of her whereabouts has ever been found. When Clare returns, now a young woman of twenty-four, Mary is overjoyed. But John comes to believe that Clare is not who she claims to be. As old tensions resurface, a gripping search for the truth unfolds.

(CA) A team led by criminologist and former detective Dr. Mike Arntfield uses its advanced skills, which include medical biophysics and private investigating along with 21st-century technology to try to solve longstanding mysteries and give victims' families closure. In each episode, the team goes into the field in search of new leads by talking with family members, dissecting new and old evidence, and re-enacting the crimes in their quest to solve these longstanding mysteries.