In California, a cinematographer moves into his girlfriend's house with her daughters, only to discover strange occurrences and an imaginary friend named Toby. As he sets up cameras to capture the events, he uncovers evidence of an entity in the house, prompting his friend to investigate the history of the property, revealing a dark secret that puts the children's lives at risk.

Paranormal Activity 3
Two siblings, Katie and Kristi, form an unbreakable bond with a mysterious, unseen being named Toby, who inhabits their home.