The film has Elise dealing with a haunting in her childhood home, but it's never very scary or interesting. Ultimately, this is the most skippable entry in the series.
This sequel makes the mistake of overexplaining everything. If it's even remotely mysterious in the first film, it is explained away here — and the explanations are rather boring.
A back-to-basics story, and a legacy sequel to boot, "The Red Door" returns to the Lambert family, the characters featured prominently in the first two films.