The snowcapped ridges in Northern Kashmir near Kargil stand tall like a foreboding rocky maze, silent guardians of a frontier region that every year is vacated by military and civilian presence when winter's icy grip renders the already inhospitable terrain doubly dangerous. With summer 1999 approaching and the Himalayan winter loosening its hold, farmers and shepherds in remote outposts return to peaks that had lain desolate for six months under heavy snowfall.

However, in early May 1999, their annual homecoming carries unwelcome shocks. Strangers occupy abandoned village homes. Unfamiliar men hauling heavy loads are spotted digging into impossible mountainsides over 16,000 feet. Gunshots are heard by alarmed locals where no outsider presence existed. Shepherds report spotting olive uniforms never seen in these parts where only Indian troops were known to operate during milder months.

As Indian patrols urgently despatched into dizzying altitudes face fierce resistance ambushes and find dominating ridges mysteriously occupied, terrible realization dawns that these are no ordinary infiltrators. Recon photos reveal trenches being dug by professionals into peak strategic points that could choke off vital supply routes. The enemy has stealthily encroached deep into Indian held territory while the isolated region lay covered under winter snows. Over 130 ridgelines along the Line of Actual Control with Pakistan are now held by heavily armed irregular militia who have covertly entrenched themselves to interdict key highway arteries to Ladakh and Siachen Glacier.

With routes to Northernmost Ladakh imperilled just as the thaw sets in, India faces unprecedented crisis. The stunning scale of infiltration across supposedly impregnable high altitude mountains catches Indian military bosses by surprise, handicapped by outdated surveillance systems unable to peer through sub zero temperatures camouflaging winter movements. As India launches belated reactions, intruders continue frantic efforts racing against snowmelt deadlines to consolidate their defences atop secured peaks. They intend to blockade India from accessing strategically invaluable positions across Upper Ladakh as domination of Kargil peaks allows bringing vast stretches of critical road network under direct enemy fire.

Will India be able rein-in this brazen territorial occupation attempted under cloak of treacherous winter climate that saw Pakistani irregular forces trespass miles into vacant Indian outposts before establishing virtually invisible garrisons on dominating heights? As the world looks askance and India grudgingly confronts possibility of having to mount near impossible dislodging missions against well prepared occupiers across jagged terrain, frightened locals brace themselves to become unwilling spectators trapped between two armed forces locked in struggle for control of cruel unforgiving altitudes where only mountain goats dared roam. How and when the tense standoff sparked after Pakistan's unprecedented Kargil infiltration gets resolved poses chilling questions as the fateful summer of 1999 casts long shadows in the heights of Kargil.