In the exciting fourth season, we fast-forward six years, discovering that Nikki (Esther Smith) and Jason (Rafe Spall) are experienced adopters having built a lovely little nuclear family, enriched by an extraordinary support network. However, as their teenage daughter, Princess (Scarlett Rayner), starts to yearn for a connection with her birth mother, Nikki and Jason find themselves confronted with the ultimate test of their parenting skills.

　　When Stacy's mom dies, Stacey puts her life and career on hold and returns to her childhood home to take care of her OCD agorophobic brother Ben who hasn't been out of the house for 23 years only to find out the house they grew up in harbors a disturbing secret.

　　Rian Mitchell discovers an emerald deposit in South America, but gets chased away before he can start to mine. He tricks his partner, Vic, into returning to the site. While there, he meets Catherine and Donald Knowland, siblings who run a coffee plantation. Rian falls for Catherine and is torn between his love for her and his love for the "green fire" of emeralds.

　　When a group of friends sneak into a state park for a night of drinking and partying, a cruel dare brings Maddie (played by Mari Blake) face to face with the disturbed spirit of young Caroline Woodman (Hallie Ruth Jacobs of Poker Face) the forest's legendary "Girl Who Cried Her Eyes Out." None are safe as one by one they suffer the wrath of Caroline's vengeance. Time is running out, and the bodies are piling up. How do they stop a 300 year old spirit that cannot be killed?

　　在電影《屍降》中，描述一群宗教心靈協會信眾舉辦喚魂儀式，想把死去的教徒喚回人世；不料卻意外招來孤魂野鬼，在屋子中作祟不得安寧。協會中高階能力者阿德（阿南達飾）趕忙處理，讓靈騷狀況暫時解除。但眾人開始逐一遭到附身，也揭露彼此不為人知的隱晦暗處。