Good horror films succeed at making subtle things in life horrifying a swirling ceiling fan, a ticking clock, the sounds of a baby monitor. We must be doomed if we live in a world where even baby monitors can be scary. Containing shades of The Amityville Horror and 1408, Insidious mixes in some original concepts with the pieces of those other films to become a successful horror movie.
The success of Insidious lies in a steady progression of terror invoked by regular objects and actions that would otherwise seem harmless. The hauntings escalate from silhouettes of unrecognizable figures and disturbing noises, to full-blown spirits roaming the halls. If you go into this film not knowing what the word "insidious" means, you will quickly figure it out.
The victim of the haunting is the Lambert family. With two young sons and a new baby, Josh (Patrick Wilson) and Renai (Rose Byrne) move into a new house that has all the familiar makings of being haunted. The structure, however, is not the problem.