The Suicidal Student - Part 1

While the CID team is at Asha's house for dinner, Asha's neighbour interrupts the gathering, begging for help. He says that his son has disappeared and left him a letter, after the neighbour scolded him for not scoring well on his engineering exam. An investigation reveals that the son had recently bought a book about poisonous chemicals. CID begins patrolling the region's day and night chemist store, intent on stopping this boy from harming himself. Will they be successful in this pursuit of justice?