Olivia (Bellisario) and Matthew Grey (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. Their futures shine bright with Olivia set to be the class valedictorian and Matt the class president. As the twins prepare for their last school year together, an unexpected tragedy splits them apart, leaving the surviving one to learn how to live without their other half – or test how far they are willing to go to bring them back.