Yu Ying Nan acts strange after waking up. Bai Gu Yi starts investigating around Luoxian Palace. The butterfly sword doesn't work except for its master so they want to kidnap Yu Ying Nan and then kill her. Rumors spread about seeing the Water Butterfly. Bai Gu Yi sends notice that the Water Butterfly is a trap, but his teacher doesn't share the news. ShuShan sends two disciples to find the Water Butterfly, but one of them gets caught. They set a trap to catch Yu Ying Nan. (Source: jindreame at MyDramaList)