After their dad's murder, three siblings move with their mom to his ancestral estate, where they discover magical keys that unlock powers — and secrets. Jackson Robert Scott, Darby Stanchfield, Thomas Mitchell Barnet, Petrice Jones, Sherri Saum, Kevin Alves, Bill Heck, Felix Mallard, Emilia Jones, Aaron Ashmore, Griffin Gluck, Coby Bird, Steven Williams, Genevieve Kang, Eric Graise, Laysla De Oliveira, Martin Roach, Connor Jessup Added on Netflix 2020-02-08.