I am thinking of creating a search engine to help people find a movie or similar movie based on the snippets of the story. For instance, if a user type in "movie about dog waiting a long time for his owners to come back", the result should return "Hachiko" , "Eight below", "Lassie" etc. However, it would have been better if we can use data mining method to actually search it based on the plot of the movie not keywords. ​What is the best solution for this work?