Oh Butterfly is a 2026 Indian Tamil-language romantic psychological thriller film written, co-produced, and directed by Vijay Ranganathan. The film stars Nivedhithaa Sathish and Ciby Bhuvana Chandran, with Attul, Nassar, Lakshmi Priyaa Chandramouli, Geetha Kailasam and Jananni in supporting roles. It is about a woman who brings her husband to her isolated hill station house to confess details about her past, but the unexpected arrival of her ex-boyfriend, invited unknowingly by her husband, leads to adverse consequences.

Summary from Wikipedia (CC BY-SA).