Xie Yunyu transmigrates and becomes the third granddaughter of Grand Tutor Xie. To avoid her engagement to her cousin, she retreats to Cool Mountain with her grandfather. At a pavilion carved with the Big Dipper, she exchanges anonymous letters with Xiao Ling, Prince Shou’an who lives in seclusion. They fall for each other without meeting. They finally meet for the first time amid rain. Later, tricked by his cousin, Xiao Ling has an unexpected incident with Xie Yunyu at the green pool. He decides to take responsibility, but Xie Yunyu pulls away, haunted by worries and status gaps, and leaves for Jiangnan with her grandfather.
