Perhaps it's part of a prank that has gone too far. Some irresponsible people might think it's funny to play such a cruel 'joke' on her without realizing the seriousness of their actions. However, this is still a very wrong and illegal behavior.
If it's safe to do so, you can try to untie her gently while waiting for the police. But make sure not to destroy any evidence that might be on the ropes or gag. You can also talk to her softly to keep her calm.
One reason could be that the robbers are just looking for easy targets. They see the girl as an easy victim, perhaps because she is alone or looks vulnerable. So they tie and gag her to quickly take her belongings without any resistance.
Perhaps she has uncovered a big secret in a corporate or political conspiracy. The people behind the conspiracy don't want her to expose them, so they tie and gag her on her tiptoes to keep her silent. They may be planning to move her to a more secluded place later to deal with her more permanently, but she might be rescued by an unexpected hero who stumbles upon the situation.
In a very imaginative story, there could be a magical or supernatural element. A soccer girl might have unknowingly entered a forbidden area on the soccer field that is protected by some magical creatures. These creatures don't understand human ways and see her as a threat, so they tie her up and use a sock to gag her to keep her from making noise that might attract other humans.
One reason could be a prank. Just like in a schoolyard or a neighborhood where kids might play a not - so - nice joke on each other. Another reason could be in a mystery or crime - related scenario. Maybe he saw something he shouldn't have, like a robbery or some illegal activity, and the wrongdoers tied and gagged him to keep him quiet.
One possible plot could be a mystery thriller. The girl is tied and gagged during a webcam session, and it's part of a ransom situation where the kidnappers are using the webcam to send messages to her family for money. Another could be in a horror context, where she is a victim of a deranged person who likes to terrify his victims on webcam.
Yes, it is most likely a crime. Tying and gagging someone against their will is a form of restraint and can be considered assault or false imprisonment. In a public setting, it also causes public alarm and distress. Laws are in place to protect individuals from such non - consensual and violent acts.
In a mystery story, it could be that she knew some secret that someone didn't want her to tell. So they tied and gagged her near the stove to keep her quiet and perhaps as a form of intimidation.
In a horror - themed story, it might be related to a serial killer. The killer ties and gags the girl to subdue her before carrying out his evil plans. The muffled screams add to the sense of horror and helplessness, making the situation extremely terrifying for the victim.
It might be a horror - themed story. The girl is tied and gagged, perhaps by some deranged person. The treadmill could be part of a sadistic plan, like she is forced to be near it for some psychological torture. The story could then be about her struggle to escape this terrifying situation.