As Blithedale searches for a missing girl, rumored to be abducted by aliens, a group of high school students experiences a series of romantic relationships and their effects on friendships.

"As an amateur PI with a bent moral compass, Ash McKenna is good at finding people but not at staying out of trouble"--

Ruth and Simon reluctantly agree to let their teenage daughter, Heather, go on a camping holiday in Cornwall with her best friend, Kelly, and her family. Then they get the news that both girls have gone missing. Kelly is found alive, but Heather's body is eventually found in an old mine, her death ruled an accident. The tragedy ends Ruth and Simon's marriage. Ruth remarries and has another daughter, but when Beatrice reaches Heather's age, she too...

"Matt Sorenson, a Manhattan lawyer, has just been offered a partnership; his wife Elise's equestrian ambitions as a competitive dressage rider may finally vault her into the Olympics. But her long absences from home and endless hours of training have strained their relationships nearly to the breaking point. In the Adirondacks, preparing to sell the cabin that's been in Matt's family for generations. When their daughter Gracie -- "Little Green"--...

Once-straitlaced officer Juliette Worth is wrongly demoted after a hostage situation gone wrong and reassigned to investigating cold-case disappearances, a situation that turns sinister when her own daughter goes missing.