In 1946, undercover reporter Charlotte Tyrell is drawn into a chilling mystery when two women disappear under suspicious circumstances from a Kings Cross Boarding House in Sydney. Are the Landlady and her strange twin daughters hiding dark secrets or is something more sinister at work? Charlotte sneaks into a locked basement and finds the missing girls' belongings. She calls in Detective Michael Devlin of the NSW Police to search the property. Michael's search reveals the basement is bare. The disappearances touch a nerve for Michael whose sister Madelaine had vanished the previous year. Theconnection runs deeper than he can imagine. His friend, Madelaine's fiancé, war veteran Joseph Moody, has rejected society and lives in the abandoned tunnels beneath Sydney's St James Rail Station. Fuelled by alcohol, Joseph grapples with haunting nightmares of wartime experiences and intruders passing through ethereal blue lights. Are Joseph's nightmares real? Lives are at risk, who will survive?