The four-part psychological thriller follows the lives of a young couple, Joanna (Jenna Coleman) and her husband Alistair (Ewen Leslie). Joanna and Alistair travel with their baby from Scotland to Australia to see Alistairs mother, Elizabeth (Stella Gonet) and to fight for custody of Alistairs daughter Chloe (Markella Kavenagh) against his Australian ex-wife Alexandra (Asher Keddie). However, when they arrive in Australia, Joanna and Alistair are forced to face an unthinkable tragedy that changes their lives and their marriage forever. It is the catalyst for a journey into the disintegrating psychology of a young woman, exposing the myths and truths of motherhood.