<□>Just as Li □ei and□Ha□ Meimei thought they had □ee□ eve□yt□ing the mansion had □o □ff□r, the□ □□□mble□ upon□a h□dde□ trapdoor in the□f□oor. Wit□ hearts poundi□g, th□y □pened□the trapdoor and de□cended in□o a□dark, mus□y □unnel below. As□t□ey □□vig□ted t□roug□ the□windi□g passages, t□e dim li□ht of the□□ flashli□□t □evealed ancien□ □r□ifacts□and cr□ptic s□mbo□s on the wal□s□ The□fu□t□er th□y ve□tured, the more□they realized □hey we□e not a□o□e in □he tun□el.□>□