This sort-of prequel/spin-off to "The Conjuring" revolves around the eerie doll named Annabelle, which featured briefly at the start of that film. Set in the late 1960s, at a time where people rarely locked their doors, young couple John and Mia Gordon (Ward Horton and Annabelle Wallis) are expecting the arrival of their first child. Mia is an avid doll collector and is thrilled when her husband buys her an old porcelain doll, that she'd been after for a while (not sure why anyone would want to own such a butt ugly, creepy looking doll, but anyway...).
That night, they're attacked in their home by members from a bizarre cult, who are subsequently shot dead by the police. Shortly afterwards though, strange things begin to happen in their home. They notice the rocking chair the doll is sat in moves on its own. Strange noises can be heard in the house during the day and the doll appears to change positions.
When a fire mysteriously starts in their kitchen, they decide to move to an apartment block, only to find that the ghostly goings on follow them and get progressively worse. Including the visiting priest getting beaten up by an invisible force, and it seems that someone or something is after their newborn child. Supposedly based on a true story (yeah, right), this is actually a completely fictional back story about how the Annabelle doll became possessed, before it ended up in the hands of the student nurses featured at the start of "The Conjuring".
If you enjoyed "The Conjuring", you should enjoy this. But don't go thinking that any of these events are real.