Bidisha, a journalist, has been pursuing a strange trend of traffic violations on Lake Gardens flyover. Some bikers tend to move aside a couple of boulders of the median to take a u-turn on the flyover. As Bidisha starts working on her story, she is suddenly picked up by police on a murder charge. Flabbergasted Bidisha, along with another junior officer, Gaurab Chakrabarty, realises, every violator in this moving-boulders case is dead. Despite all odds, the duo could not resist chasing this ‘unputdownable’ mystery and as expected, faces misery.