Dhuruvan is a forest ranger, who is assigned the job of training five girls from the NCC camp. The group hears of a terrorist activity being carried out in the forest and makes a plan to defeat them.

Srinu (Bharat) and Anjali (Sharanya) study tenth class in the same school. They fall in love with each other. Their friendship cum love thickens when they continue studying together in Intermediate. Later they get married and lead a family life. After initial struggling, Srinu gets a good job and Anjali gives birth to twins. But their happiness is short lived as Anjali dies in an accident. Srinu tries to commit suicide, but he is rescued by Sandhya (Sunaina). And how Srinu manage to lead his life without Anjali, forms the rest of the story.

Ganesh falls for his extremely caring and helpful new neighbour, Nandini, who lives in a house opposite to his. But, when Ganesh and his parents put forth a marriage proposal, she turns them down.

Murugan is a diligent scooter mechanic in Madurai, whose life goes on smoothly until a rich schoolgirl named Aishwarya sets her eyes on him. The infatuation reaches dangerous levels when she coaxes Murugan to take her away from the clutches of her family, which has other plans about her future.

A boy's life is affected when his mother neglects him and shows all her affection to his elder brother. Desika made his directorial debut with the film, after having apprenticed under Thambi Ramaiah, Sairamani and Sakthi Chidambaram for fifteen years. He approached real estate businessman Jaya Ilavarasan with the script and succeeded in convincing him to make his first film. The team began filming scenes across Chennai in September 2012 under the title of Vaalu. During production, the film faced a legal tussle over the title with the makers of the Silambarasan starrer Vaalu. The Producers Council concluded that Desika's team had not registered the title and subsequently the film used Rettai Vaalu instead. The music for the film was composed by V. Selvaganesh and the lyrics were written by Vairamuthu. In June 2013, the team held an audio launch function where the first CD was released by Vairamuthu and received by producers R. B. Choudary and Keyar.

Chinna (Vishnu) is a very witty and resourceful person who knows how to get things done. As kids, Chinna and Piccheshwar (Vennela Kishore) have a tiff and Piccheshwar leaves the village in a huff. Piccheshwar’s outraged grandfather (Kota Srinivasa Rao) orders the execution of Chinna’s family, forcing them to flee as well. As the years go by, Chinna grows into a tall and fearless young fellow. He applies for a job as a journalist and he is sent on an assignment by his boss Avatar (Posani). The assignment is to conduct a sting operation on Minister Dilleeswara Rao (Pankaj Tripathi). Chinna succeeds in capturing incriminating footage, but he is caught and thrashed by the minister’s goons.

Mazhaikkalam, another youth love story, with a twist at the end.

Vishwa spends his time hanging out with Anandham to avoid his mother, who always quarrels with his dad. To find peace, he plays tricks on others. Among the victims is Jothi. The story moves to London, where Vishva visits Princess Diana's grave and leaves a beautiful poem behind. At the same time, Jothi too visits the grave and leaves a note after reading the poem. Then begins a warm relationship between Jothi and Vishwa without seeing each other. Whether the two are united form the rest of the story.