Alone, which stars Bipasha Basu and Karan Singh Grover, is a horror love story that revolves around conjoined sisters. When one sister dies, she returns to seek revenge on the other. Bipasha plays both sisters, both the vengeful sister and the victim. The film is produced by Kumar Mangat Pathak, Abhishek Pathak, Pradeep Agarwal and Prashant Sharma, and it is a remake of the Thai blockbuster of the same name. Watch the sexy yet intensely scary trailer below.