Arrive at New Jalpaiguri Railway Station (NJP) and transfer to Gangtok. Check-in at Hotel have Lunch and take some rest. At the evening, explore M.G. Marg, the heart of Gangtok by walk. Stay overnight.

Early morning drive from Gangtok to Lachen, a high-altitude village in North Sikkim. 

Enjoy scenic views and visit attractions like Chungthang and Seven Sister Waterfalls along the way. Check into your hotel in Lachen / Lachung as per govt. Permission. 

Early morning visit to Gurudongmar Lake (depends on govt. Permission), one of the highest lakes in the world. Afterward, drive to Lachung, another charming village in North Sikkim. Check into your hotel in Lachung. 

Or if you are in lachung then visit Zero point and Yumthung valley and then back to hotel, stay overnight in lachung 

Visit Yumthang Valley, also known as the "Valley of Flowers," and enjoy its scenic beauty. Consider an excursion to Zero Point (Yumesamdong), located near the Chinese border. Return to Lachung and then drive back to Gangtok. Or directly back to gangtok and visit M G Marg at the evening for final shopping if you need, stay overnight in Gangtok 

Enjoy a final breakfast in Gangtok and Transfer New Jalpaiguri Railway Station (NJP) for your departure. Via local sightseeing as much as possible.. departure.