A cold river demarcates two different worlds.
The children chosen by the oracle must use their destiny to explore a path to the other side, which is called the 'test'. Xuema - a confused young man, sitting by the river all day long staring at the other shore, trying to fight, but bound by love and friendship, he embarked on the road of 'postgraduate entrance examination' without hesitation.
The poignant love between Hulun and Bell; the tears of Po Meng in Wangxiangtai; Santu River, Wangchuan, Bianhua, Rhododendron, Xing'an... The ancient songs dispersed in the air. Those unforgettable memories have been transformed into beautiful legends. The truth has been buried, the content of the story has been sealed in history, and the characters in the story have dried up under the grass and dust, and gurgled away along the cold water of Hanhe River.