We can all remember the Insidious franchise that started in 2010 with the first movie.

The initial film and its sequel, Insidious: Chapter 2, focused on the Lambert family in which Patrick Wilson's Josh Lambert and Ty Simpkins' Dalton Lambert have astral projection capabilities.

Unfortunately, this left both father and son vulnerable to being targeted by demons and other unclean spirits seeking life via the possession of a human host.

Insidious 3 and Insidious 4 did not feature the Lambert family. However, Insidious 5, also known as Insidious: The Red Door, will.

This week, a new trailer for Insidious: The Red Door dropped and it has the internet talking.

What to know about Insidious 5

Marketing for Insidious: The Red Door notes its status as the final chapter within the Insidious franchise. The plot of this film takes viewers back to the Lambert family ten years after the events of the first movie that saw Dalton undergo demonic attacks.

This time, Dalton is all grown up. He's heading off to college. However, despite Josh and Dalton undergoing memory suppression to leave them less vulnerable to the dangerous world of The Further, it appears they landed back on the radar of the demonic.

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Insidious: The Red Door's trailer shows the infamous lipstick-faced demon that targeted Dalton as a little boy is back again. In fact, the demon is seen standing behind Dalton as he's attempting to help his father.

From the looks of Insidious 5, Josh and Dalton will eventually have to return to The Further in order to defeat the demons targeting them once and for all.

Insidious: The Red Door likewise marks the directorial debut of Patrick Wilson.

More critical details

The fifth installment of the Insidious franchise will hit theaters on Friday, July 7.

In one promotional photo for the film, the Lambert family is seen attending a funeral. This funeral could potentially be for Josh's mother, Lorraine Lambert.

Although this has yet to be confirmed, one fan theory could suggest that Lorraine's possible death served as the catalyst for the Lambert family having to face off against the demonic once more.

Viewers of Insidious: The Red Door can likewise expect to see Lin Shaye again. She will make a return as the much-loved Elise Rainier. Insidious 5's trailer shows her in a video recording, warning about the dangers of The Further.