QUESTION.....................?

Can anyone tell me how Male lead died....? I really didn't understood this part. He went to New Zealand , He shoot the video there for Na Bo-ra, But how he died. Please anyone explain this to me. Just now I finished watching this movie I'm in a confused state what had happened to hero? How he died? Please anyone explain this to me. Just now I finished watching this movie I'm in a confused state what had happened to hero? How he died?