Well heres a short synopsis 😃
So kajal brings raju to impersonate as dev but later when kajal starts doubting raju that mayb he has joined hands with karan-ameesha,that time she decides to kill herself,so raju saves her and he finally confesses that he is only her dev 😃 and he had to pretend as raju to take revenge from karan-ameesha and he had hidden this fact from her so that he doesn't get weak in front of her 😳 ..but kajal doesn't believe him initially but after dev gives lots of proofs of his real identity,kajal finally starts believing him and they unite once again 😃 ...but just then karan's phone call comes on dev's cell and kajal picks it up and karan who still thinks that dev is raju thinks raju is on the other side of the phone and tells that he is doing a good job in pataofying kajal ,so kajal once again misunderstands dev and thinks he is raju only and in the house NT decides to marry them off and just when the marriage is about to take place kajal gets up from the mandap and refuses to marry and takes NT in a room and tells her that raju is dev and karan had killed dev,so NT gets hyper hearing this and comes downstairs to fire at dev,but her legs slip from the staircase and she dies in the hospital even after dev donates blood to her ,so dev blames kajal for his mom's death and kajal later comes to know that she was ast fault and raju is only dev as he had given blood to NT,karan also realizes this...so dev drags kajal out of the house and tells their relationship is over forever ...meanwhile we as audience get to know that karan had placed some marbles on the staircase due to which NT slipped but dev is unaware of this fact
Butter the story is going in a weird manner...ok heres a short summary after NT's death...
NOW kajal becomes a lunatic and runs behind dev for forgiveness but dev cares a damn for kajal ,so kajal gets a tremendous shock and goes missing and satya blames dev for it but dev also insults satya and dev doesn't even bother to find out kajal ..kajal is then saved by a new charater Aditya as she was about to fall off from the train..this aditya takes unconscious kajal to his house and when she comes to her senses,we see that she has lost her memory and thinks that aditya is her husband (she gets the flashes of her incomplete marriage with dev and dev dragging her out of the house but couldn't see the face of dev and believes that she is seeing this aditya guy in her flashes and that she is married to him);menwhile dev bangs his car with aditya's harvard returned sister sonia's car and gets into an argument with her ..and we also see that nandini knows that karan is responsible for NT'S death as she saw him keeping the marbles on the floor but she wants to save her husband from dev and so she has not told this truth to dev,but now she is feeling guilty and thinks of telling the truth to dev as karan is continuously giving dhamki to nandini that he will kill dev if she doesn't get money from dev from outside the house(dev got karan out of the house too),now we see that karan finally tries to kill dev and he fires at dev but nandini pulls dev's hand in time but he still gets hit on his right arm
ok this was long 😆 😕 ..but this has what happened till now 😳