In the beautiful atmosphere of Chiang Mai, the city of mountains, mist and tea culture, Lin, the owner of an old-fashioned Chinese tea shop, Hom Muen Li, reunited with An, a dedicated resident doctor who has poured herself into work, forgetting her own needs and some people along the way. For Lin, An is the senior she secretly loved since high school, but upon their reunion, An fails to recognize her at all. Still, An has become a regular customer who stops by for the same cup of tea every day because the tea from the shop is the only thing that helps her sleep peacefully after those long nights at the hospital.