From the Yuan Dynasty to the first year of the Yuan Dynasty, Xiao Ce, the guard of the border pass "Jinghu Pass", met Agula, a woman from the Western Regions who was living in the border pass due to tribal wars. Agula was good at making Populus euphratica ointment, which could cure frostbite and was trusted by soldiers. However, her identity was questioned and she was framed as an enemy spy. Xiao Ce fought against all odds to protect her, and the two worked together to improve military supplies and resist the invasion of foreign enemies. In the stormy and snowy night at the border, the cross-ethnic friendship gradually warmed up.
