The film is about Casanovva, a serial womanizer. Casanovva is a billionaire playboy and the owner of Casanovva’s Eternal Spring, an international chain of flower boutiques. He has at his beck and call a faithful array of female followers including his staff, friends and former girlfriends, who will do anything for him. The film starts with a robbery carried out by four criminals and they decide their next target in a wedding hall. They enter the wedding place as Casanovva's (Mohanlal) guests. Casanovva recognises them but allows them to attend the marriage function having some plan in his mind. The young criminals ( Alexi, Salim, Arjun, Kiran ) take some photos of their targeted rich persons and collect their details. Casanovva watches all this and does not respond at the moment. The next day is the wedding ceremony. Casanovva, with the aid of his friend in a TV channel (without revealing his plan), plans a live telecast program to capture the four criminal's robbery. But unfortunately, the wedding is postponed due to some unexpected reasons. Thus the robbers pull out from their plan. But within this time the TV channel people come for the telecast. Suddenly Casanovva gets an idea and announces a new live romance reality show through the channel named ''FALL IN LOVE''. Then he creates some plans to make the two people in the robbery gang to fall in love with Hanna (Lakshmi Rai) and Ann Mary (Roma Asrani) and telecast their love scenes using hidden cameras through the live reality show ''FALL IN LOVE''. Hanna falls for one of the young robber by hearing the words of Casanovva, who was her boss. The four robbers try to steal a sword, but casanovva (wearing a mask in face) interrupts them and takes the sword from them. By this time, the TV show became popular and causes some problems to Ann Mary, the robbers and even Hanna. Hanna asks her boss Casanovva what his plan was. So Casanovva reveals his flashback to Hanna.