Definitely not. Unhinged (2020) is a made-up story. The plot and characters were crafted by the filmmakers to thrill and engage the audience rather than being drawn from real-life events.
It depends on your definition of a 'real story'. 'Unhinged' might incorporate elements from real life, but it's likely a blend of fact and fiction to create an engaging narrative.
Not commonly. Story grammar tends to favor a single, defined kick-off. It provides a clear starting point and makes it easier for the reader or viewer to follow the story's development.
An unhinged novel often features erratic or unpredictable characters. Their actions might not follow the normal logic. For example, a character could suddenly change their life goals without any clear reason. Also, the plot can be wild and all over the place, jumping from one extreme situation to another in a short span.