In the movie siddhart as jai and katrina as diya are actually childhood buddies and as they grow old they start developing love.
Later on jai becomes a mathematics professor and aspires to go to cambridge university where as diya becomes an artist( painter) .
When diya proposes jai for wedding, jai gets hesitent at first but finally agrees. but the problem starts now as jai wants to settle down in england and diya wants to live in india as there families are here.
That night after an argument and consuming alcohol he sleeps and time travels to the future.
The concept of time travel to the future does not get real and the audience dont relate to it.
The movie becomes bore as it proceeds to the climax and even the kala chasma song is placed after the movie ends.