ImMATURE follows the lives of three teenage boys - Dhruv, Chacha and Chutney who are in their final year of high school. They deal with the everyday ups and downs of being a teenager, including friendships, first love, heartbreak, etc.

Dev travels to Thailand to attend his best friend and childhood crush's wedding. He meets Meghna and seems to have an instant connection with her. What does fate have in store for them?

Satya, a collegian, is smitten by Vaishnavi, who belongs to another college. He joins her college, hoping to court her but a fearsome gangster, Keshu Bhai, is attracted to Vaishnavi too.