"Isolated in the aftermath of tragedy, Erin Fullarton has felt barely alive since the loss of her young daughter, Korrie. She tries to mark the milestones her therapist suggests - like today, the 500th day without Korri - but moving through grief is like swimming against a dark current.Her estranged husband, Zac, a brilliant astrophysicist, seems to be coping better. Lost in his work, he's perfecting his model of a stunning cosmological phenomenon,...