Mystery!!...a word when you hear then you just want to know any mystery... ...Mystery means something that is very amazing ..if you will start hearing about a mystery then you just want to see that...for example if you hear about a mysterious treasure then you just want to find it....Mystery is filled with adventure a mysterious journey as you are set to find a ghost or a treasure....a mysterious story is very interesting as when you will start reading..watching or listening to a mysterious story then you will be very excited to know what happened next....and at the end you would be knowing who was the real villain and hero.... 

Introduction :-
Mystery refers to the incompletion of anything on a topic . It means suspense . 

Main body :-
Mystery is also very important in one's life . People have to face many mystery in their life . It makes thrills and spicy atmosphere as there is no solution exists . Mystery is divided into 
"traditional mystery", 
"legal thriller", 
"medical thriller", 
"cozy mystery", 
"police procedural", 

Sometimes it also causes some trouble . As it is so excited people even could face heart-attacks due to the stress on the nervous system. 

Example :-
We don't know much about the black hole. A black hole is a place in space where gravity pulls so much that even light can not get out. We can't get any reason for it .

Conclusions :-
Peoples are very fond of thrills and spice so they like mystery stories / films/fiction very much .