The plot of 'The Binding Based on a True Story' could be quite diverse. If the 'binding' is literal, perhaps it's about a hostage situation or a captivity story that actually happened. It could also be about a more complex web of relationships and obligations. For instance, it could be about a historical event where different parties were bound by treaties or agreements. Or it could be about a personal journey where an individual is bound by their own past actions or decisions that are rooted in the true story. It might also explore themes of freedom versus constraint, and how the characters deal with the 'binding' situation they find themselves in.
Since it's based on a true story, we could expect a plot that is centered around real - life events that led to a form of 'binding'. This could be about a family feud where people are bound by loyalty or revenge. Or it could be about a social or cultural phenomenon that binds people in a particular community. Maybe it's about a group of people who are bound by a common goal or a difficult situation they all face as a result of the true events.