This monograph explores the dynamics of India-Pakistan relations in the aftermath of Operation Sindoor. A relationship that had frayed considerably since the last decade took a turn into a new abyss after the sinister and despicable terror attack that killed 26 innocent tourists, singled out on the basis of their religion, in Pahalgam on 22 April 2025. Actions taken by India across the Diplomatic, Information, Military and Economic (DIME) paradigm have been unprecedented leading to rewriting of the rulebook of India-Pakistan relations. The monograph examines Pakistan’s compulsions, India’s military retaliation of deterrence by punishment and the challenge of cross border terrorism under the nuclear shadow.