Drown (Persian: شنای پروانه, romanized: Shenā-ye Parvāneh) (also titled Butterfly Stroke) is an Iranian drama crime mystery film directed by Mohammad Kart.

[1][2][3][4][5][6][7][8] Parvaneh (Tanaz Tabatabai) goes to her brother-in-law Hojjat (Javad Ezzati)'s refinery garage and asks him to stop his brother Hashem (Amir Aghaei).

Police say the SIM card that first aired the film belonged to a man named Reza Zare, who recently escaped from an addiction camp.

Akbar Kenti (Behrouz Panahandeh), one of the abductees, admits that it was him that reported to the police and he did so on the orders of a woman who claimed to be the temporary wife of Hojjat.

Instead, he prepares three and a half kilos of Methamphetamine (the amount which can follow a death sentence for the smuggler) and embeds it in Mosayeb's apartment and calls the police to arrest him.