Two cops from the Cyber Crime Department from Chennai, Akilan Vishwanath and Baskar, are sent as trainees to Las Vegas by the police chief. While in Vegas, they work with Isha Thomas, a 9-1-1 dispatcher who receives several calls for help; Batten, the chief police inspector of the Las Vegas Police Department; and Swetha Menon, a Malayali dispatcher from Kozhikode. On one such phone call, Isha gets a call from Jennifer Edward Rubis, who tells her that a man has entered her house. Much to the man's demise, Jennifer is able to escape out of an upstairs window. Akilan and Baskar later figure out that the man who entered Jennifer's house was Lucifer Fernando, a psychopath who murders girls for their blood type (B+) to "purify" his blood. Lucifer is taking a Sri Lankan Tamil woman, Mathangai Kumaravel, hostage. While searching for details about Lucifer, Akilan learns of Kasie, Lucifer's ex-wife who filed a divorce after she learned that he was flirting with another woman. Kasie recorded her phone calls with Lucifer on behalf of her lawyer and hands them to Isha. How Akilan sets out to rescue Mathangai forms the rest of the story.