Till Death Do Us Apart

Charlie Stersen just turned 16 years-old when his parents decided to get a divorce. Not really surprised since they always looked forced being happy together, for as long as Charlie can remember. Harper Milton and Diana Vancher were also 16 years-old. What does these teens have in common you may ask? All their parents disappeared in the same year, and this misteriously.
A bunch of teens who doesn't know eachother, but might have the same story.