Three friends attend a wedding as bridesmaids for the bride, whom they have known since college.
The events take place on a train bound for New Delhi, where a deadly battle breaks out between two commandos facing off against a gang of outlaws.
Together with an FBI agent, a police chief and a detective track down a serial killer who left skeletal remains in the New Mexico desert. However, a complex web of mystery raises doubts when their goals and strategies collide.