Anand and Anasuya meet each other on a train ride. The two eventually fall in love and have to fight for their relationship.
A Aa is a 2016 Telugu romantic comedy film written and directed by Trivikram Srinivas. Produced by S. Radha Krishna under his banner Haarika & Hassine Creations, it features Nithiin and Samantha Akkineni in the lead roles. Mickey J Meyer composed the film’s score and soundtrack while Natarajan Subramaniam and Dudley handled the cinematography. The film is loosely based on the novel Meena written by Yaddanapudi Sulochana Rani, which had already been adapted into a 1973 movie Meena starring actor Krishna and his wife actress Vijaya Nirmala in her directorial debut.  Samantha won the Best Actress award at the 64th Filmfare Awards South and Best Performance in a Leading Role at the 2nd IIFA Utsavam Awards, for her performance as Anasuya Ramalingam.
A Aa revolves around the lives of 23-year old Anasuya Ramalingam (Samantha Ruth Prabhu) and Aanand Vihari (Nithiin) and their families. Aanand, a former chef, Runs an E-food business in Hyderabad. He belongs to a middle-class family and has many responsibilities to fulfill, like marrying off his sister Bhanumathi (Ananya) and paying off debts.
Anasuya is the daughter of a rich and strict mother Mahalakshmi (Nadhiya). When her mother goes on a business trip, her father Ramalingam (Naresh) sends her along with Mangamma (HariTeja) to Kalavapudi village near Vijayawada to spend some time at Aanand’s home.
Aanand happens to be her cousin but she doesn’t know about his family till she is sent there. While she happily discovers the joy of being at her aunt’s house, she comes to know that Aanand is being forced to marry Nagavalli (Anupama Parameswaran) by her father Pallam Venkanna (Rao Ramesh). But he had agreed to marry her only after Bhanu’s marriage. Anasuya and Bhanu also become good friends. Comedy scenes take place when she asks for an A.C. and a T.V. For which he unlikingly buys her 90,000 T.V. and gives a stick and rope to open and close window which is equal to A.C. at night. One day when Nagavalli comes their house and indirectly shows attitude to Anasuya, she gets angry and asks Aanand because he had carried her that day because she refused to eat dinner for which he does it again and this time she shows attitude.
Nagavalli gets angry and asks Pallam Venkanna to do something of her. He then calls her father and asks him to control his daughter. But Gopal (Srinivasa Reddy), Mahalakshmi’s secretary, calls Mahalakshmi and reveals everything. Her father understands this and calls Aanand and asks him to bring Anasuya and Mangamma back before Mahalakshmi comes from Chennai. Aanand borrows a jeep from Nagavalli (She gave him the jeep after he said he wants it to leave Anu to her house)he then goes in road and travels down the aeroplane and reaches the house when srinivas reddy gets phone call.
Anasuya now realises her love for Aanand when he drops her in time. However, Mahalakshmi has already arranged her to marry a rich guy Shekhar(Srinivas Avasarala). As two times their meeting cancels, Anasuya is forced to meet him at golf course. She accidentally hits the ball on his head and the other worker’s head. When she goes to the hospital to visit, she runs into Aanand. He reveals that he came here because Pallam Venkanna had harshly talked about Bhanu not getting married as she has no status and asked him to marry Nagavalli at the end of the month. This had hurt his mother and she is now hospitalized. Anasuya is happy to see him. However, her plans are crushed after Nagavalli and Pallam Venkanna arrive. Nagavalli again starts getting close to Aanand and this angers Anasuya She pleads Aanand to let Bhanu come and stay with her. Aanand agrees but gives permission for only for one day.
Anasuya brings her home and reveals to Mahalakshmi that Bhanu is Aanand’s sister. Mahalakshmi initially refuses to let Bhanu in,but agrees later. She reveals that she had taken a loan from Aanand’s father for business and when she came to return the money, they had refused and closed the door on her face. She warns Anasuya to be careful with Bhanu. That night Bhanu sees Shekhar’s photo and says he is good looking. Anasuya again gains an idea and next day takes her to a mall and makes a deal with Bhanu that since, she had canceled her marriage, Bhanu owes her and should do the same for her,for which Bhanu agrees. Anasuya again meets Aanand in the mall. She also comes across her mother’s friend Latha (Sana) and is caught with Aanand but is relieved when she sees Latha having an extra-marital affair with Raghu (Raghu Babu) although she is married.Pallam Venkanna’s brother Pallam Narayana (Posani Krishna Murali) also comes across them but Aanand manages to divert him. Meanwhile, Shekhar falls for Bhanu. But his grandfather mistakes Bhanu for Anasuya and arranges for their marriage. Anasuya proposes to Aanand who reveals that Mahalakshmi refusing to give back the money she borrowed, was the reason for his father’s death. Mahalakshmi discovers that Shekhar loves Bhanu and not her daughter and locks her up. This angers Anasuya who meets Aanand and urges him to elope with her. He refuses and this angers her more and she starts walking aimlessly. She gets kidnapped by Pallam Venkanna’s henchmen. Aanand brings her back in time for her engagement with Shekar and takes Bhanu with him. He reveals to Bhanu that he loves Anasuya, and she urges him to reveal the truth to Anasuya. He goes back and does so saying that he will keep her happy in anyway she wants and takes her. Mahalakshmi demands A Anand to let go of her daughter for which he says that she had gone to give money on the burning day of his father and she is the reason for his death and takes Anasuya with him.
When Anasuya and Aanand reach his house, she is surprised to see her parents there. Her father reveals that, as soon as Anasuya and Aanand lefy, Mahalakshmi had a heart attack and he changed her mind about them. And the relationship between her mother and Anasuya is also good now. Aanand catches a mouse says that there is no one to trouble her anymore leaving him for which she laughs.
Pallam Venkanna sees that Nagavalli is happily eating chicken and not worried about Aanand and Anasuya. She says that if one day they are separated, he will come to her only to marry. Pallam Venkanna tries to stop Shekhar from visiting Bhanu to fix their marriage, but is unable to . The film ends on a happy note.