Olivia (Troian Bellisario) and Matthew Grey (Tom Felton), are 18-year-old twins born into a world of privilege and high expectations. There are almost no boundaries between them; even their dreams are connected. As the twins prepare for their last year of school together, an unexpected tragedy splits them apart, leaving the one survivor to learn how to live without their other half - or test how far they are willing to go to bring them back.