Jealous, Betrayal, Mistakes, Redemption- Introduction in POV

Some one is jealous, he is making Arjun Betray Radhika, by sleeping with Radhika's sister, thinking that Radhika betray him by getting engaged with Neil when only she is practicing how to propose marriage proposal to Arjun, when Arjun fines out his mistake, how will Arjun do Redemption for Radhika, and who is the mastermind in this game, what does he want, find out the truth by reading this story...