Lin Wan went home carrying half a watermelon, but was unexpectedly dragged into the highest-mortality SSS-grade dungeon, The Yin Mansion Wedding Banquet. Facing a courtyard full of fierce ghosts, she prepared to fight for her life, only to find that the welcoming basin mother-in-law was her second aunt, and the main table evil ghosts were her grandparents. While others cleared dungeons relying on strength, she relied on recognizing relatives to cruise through to victory. But when a "fake relative" infiltrated the main table, and the true bride came knocking to demand a name, a marriage pact concealed by the Lin family for a century also surfaced. To save her family, Lin Wan decided to personally end this century-spanning Yin mansion wedding banquet.