FIRST KILLING

Musa-Bin-Sulemani, the most wanted terrorist on earth has captured and executed an Indian agent who had found some important and crucial information about the next attack which the terrorists were planning. "Big bombings, They are planning to ..." were some of the last lines sent by Raghav to the agency.
What was that he had found?
How far will his younger brother Vikram go to take the revenge for his younger brother?