To be clear, 'Kidnap' has no roots in reality. It's a work of imagination designed to entertain and captivate audiences with its suspenseful storyline that doesn't draw from actual happenings.
In real kidnap stories, there is often a period of planning by the kidnapper. They might study the victim's routine, like when they go to work or school. Also, there's the aspect of the victim's family or friends being extremely worried and getting the police involved as soon as possible. There can also be a struggle between the kidnapper's greed for whatever they want (usually money or something valuable) and the safety of the victim.
Some gay kidnap stories are based on real events. Unfortunately, there have been cases where gay individuals have been targeted and kidnapped due to homophobia. However, not all such stories are real. Many are fictional works created to raise awareness about the issues gay people face, like discrimination and violence.
Well, there was this one real kidnap story I heard. A young girl was kidnapped while walking home from school. The kidnapper was a man who had been stalking her for days. He took her to an abandoned building. Fortunately, the girl was smart. She managed to leave a small clue in the van when he was transporting her. The police found that clue and traced it back to the building. They rescued the girl and caught the kidnapper.
I don't have enough information about this story. It could be a local incident that not many people know about outside of a certain area. Maybe it was a crime of opportunity for the man, seeing the hospital as a place where he could easily take people hostage.
One common element is the element of surprise. Kidnappers usually target their victims when they are least expecting it, like when a person is walking alone at night or a child is distracted in a public place. Another is the use of force or coercion. They often use threats to keep the victim compliant. For example, threatening to harm their family if they try to escape.
Kidnap isn't based on a true story. It's a made-up tale designed to entertain and engage the audience through fictional elements and creative storytelling.
I don't know for sure. You might have to look for official statements or reviews from the filmmakers to get a definite answer on if it's based on a real incident.