Haunted by the death of her sister and the decades-old cold case of best friends Bailey and Celeste, eighteen-year-old Tru becomes entangled with a mysterious girl named Rio, as their pursuit of the truth unveils an otherworldly connection to the victims and puts them in the crosshairs of a potentially resurfaced killer.

Mary Anne and the BSC think that Luke Martinez, one of their newest charges, has a secret which holds the answer to a mysterious fire at his house and information that could help stop a mean developer from taking over Stoneybrook. Can they win his trust before it's too late?

An elite group of underdogs trained to fight crime must save their unique school from shutting down.

"Twins Theo and Alexander Sinister-Winterbottom have spent their vacation following clues, solving puzzles, and escaping some dreadful situations. The journey has brought them here, to Siren's Song Seaside Amusement Park, where visitors are lured in by cotton candy and carnival games--and secrets hide behind every attraction. The twins now know Essa is the enemy. But one mystery remains: Why is Essa so determined to find their parents? Will they be...

While Inspector Wyatt and Andrew's mother are on their honeymoon, Andrew and Sara investigate a mysterious statue that produces light and sound.

While playing on her big sister's softball team, Karen notices equipment and pages from her sister's notebook are missing. She and her friends set out to find out why anyone would want to sabatoge the team.

Zachary, living with his divorced mother in California, finds violence gradually invading his life and making significant changes in his day-to-day existence.

Andrew and Sara help an inspector from Scotland Yard uncover the identity of a murderer and a monster associated with Lord Sommerville, an Assyriologist.

The Bailey School Kids decide to investigate when they begin to suspect that the cook at the new pizza place is really a dragon.

When a ghost dog and other meddling monsters appear at the dog park, Krypto and Scooby-Doo team up to find out who is behind these mysterious happenings.