ᴡʜᴀᴛ ᴛʜᴇ ᴡᴀᴛᴇʀs ʟᴇғᴛ ʙᴇʜɪɴᴅ (𝟸𝟶𝟷𝟽) [International Film w/ English Sub]

In 1985, the Argentine city of Epecuén was buried under ten meters of salt water. 30 years later, the water has receded, and a group goes there to make a documentary. But then they discover that they are not alone.