After being stabbed in the heart in the Season 2 finale, Dr. Alex Reid (Erica Durance) has a profound experience in the liminal space, while a desperate Charlie Harris (Michael Shanks) and his ex – Dawn Bell (Michelle Nolden) race against the clock to save her life. Meanwhile, Dr. Joel Goran (Daniel Gillies) is pulled in to the ER to treat a suicidal patient that tests his duty as a doctor, and Maggie Lin (Julia Taylor-Ross) makes a bold decision that changes her relationship with Gavin Murphy (Kristopher Turner).