They won't have to visit. Both Kahn and his wife have suffered heart attacks (amazing, isn't it?) and the daughter will return. After some 'questioning', they will find the location of the material they are looking for.
There are some very interesting parallels in the Indian movie "The Hero." Good movie if you can find it, don't mind subtitles, and can get past he musical sequences that are integral to all Bollywood flicks.
Oh, by the way, few Bollywood movies are shorter than 3 hours, so make a lot of popcorn!