If you want to understand the movie's deep and confusing ending, you can watch this summary and explanation in Hindi:

Ending mein, David ko chunna hota hai ki wo is perfect sapne mein rahe ya asli (aur shayad mushkil) duniya mein wapas jaage.

However, because of the movie's complex plot and cult following, you can find detailed on platforms like YouTube to help you understand the surreal story. Movie Plot Summary (Hindi/Hinglish)

David ko lagta hai ki surgery se uska chehra theek ho gaya hai aur wo Sofia ke saath khush hai, lekin dhire-dhire uski duniya surreal hone lagti hai. Use pata chalta hai ki wo asliyat mein nahi jee raha, balki ek "Lucid Dream" (sapne) mein hai jo ek tech company "Life Extension" ne create kiya hai jab wo 150 saal pehle cryogenically freeze hua tha.