BLUE is set in the sun-soaked white sand beaches of Bahamas. Sagar [Sanjay Dutt] is a simpleton, while his friend Aarav [Akshay Kumar] is a rich, ambitious businessman. Sagars brother Sameer aka Sam [Zayed Khan] has inadvertently managed to rankle the mafia in Bangkok [Rahul Dev]. He flees Bangkok and arrives in Bahamas. But the dangerous men reach Bahamas too. Sagar is the sole person who can bail him out from this crisis, but to save his brother, Sagar has to wrestle with the ghost of his dead father.