Max Monroe, after discovering a detective agency in his grandfather's backyard, befriends the ghost of his great-uncle and the two join forces to solve the mystery of a missing birthday girl.
Recovering from the flu that has decimated the world in 1918, Ivy, a girl with the ability to see ghosts, is shattered by the breakdown of societal governance and her father's and brother's role in the murder of a young German.
When Jack enters the deserted house in his neighborhood, he finds a group of people who invite him to take the thirteenth chair in the room and share a story--in the house where the ghosts meet.
In 1932, in Sydney's deadly Razorhurst neighborhood, where crime and razor-wielding men rule, two girls with contrasting lives who share the ability to see ghosts meet over a dead body and find themselves on the run from mob bosses.