Plot is related to Movie. you are likely to find Sound in/at/on Movie. Sound is a synonym of Good. 
Mission is a type of Assignment. Transmission is derived from Mission. Transmission is part of Automobile. Automobile is a type of Travel. 
Plot <--RelatedTo--> Movie <--AtLocation-- Sound <--Synonym--> Good 
Assignment <--IsA-- Mission <--DerivedFrom-- Transmission --PartOf--> Automobile --IsA--> Travel 