When a delusional shut-in discovers that his favorite webcam model has been kidnapped, he must utilize his detective skills to locate her before she becomes another victim of a rampant madman.

I liked the detective skills part myself, it leads one to wonder if the shut-in might actually leave his house to do the investigation.

Somebody beat you to it.
http://www.imdb.com/title/tt2503154/

I would avoid to use favorite porn webcam model in the logline.
That make the protagonist seedy and creepy.
A reluctant h?ro is common, but a main character who the spectator does not respect is a big NO, NO.

Kidnapped by a gang of sex traffickers, a lonely neurotic nerd must save his favorite web-cam girl from them.