The show 'Hijack' is not based on any true events. It's the product of the imagination of the writers and creators, designed to provide an exciting and captivating viewing experience without being tied to reality.
Well, in many Indian plane hijack cases, there's the initial takeover by the hijackers. They usually board the plane with some sort of weapon or by using threats. Then, they make their demands known, which can range from the release of prisoners to political concessions. The authorities then scramble to deal with the situation, often setting up communication channels with the hijackers.
One common plot twist could be that the hijacker is not who they seem. Maybe they are being forced to hijack the plane by some unseen villains. Another could be that there is a secret agent among the passengers who manages to turn the situation around. And sometimes, the destination the hijackers claim to be aiming for is just a decoy, and they have a completely different and more sinister plan in mind.
One lesson is the importance of security screening. For example, in many hijack cases, it was found that there were lapses in the security checks that allowed the hijackers to get weapons on board. If security is tightened, such incidents can be reduced.