Although he got along well with them, Zisu still wanted to get the Bixi and went to the secret realm where the Xiantang tree was located privately. As a result, he was attacked by the water fireflies guarding the secret realm.Zi Su fell into the illusion of getting along with her mother as a child. Missing her mother and witnessing her death made Zi Su unable to wake up for a long time and was about to be swallowed by water fireflies.
A Nian came to save him and was also implicated. Fortunately, A Nian's grandmother arrived in time to save the two of them.As a result, grandma was seriously injured, and Zisu felt that he was hurting grandma for his own personal gain.Grandma did not blame Zi Su, but revealed his true purpose of coming to Sushui and the fact that he liked A Nian.