<□>Just as□Li Lei and Han□Meimei th□ught t□ey □ad seen□everything□the□mansion had to offer, they □□umbl□d upo□ a h□dd□n t□apdoor□in the f□oor. With hearts pounding, t□ey ope□ed th□ trapdoor and descen□ed into a□dark□ musty tunnel □□□ow. □s they navi□a□□d □hrough the wi□ding passages, the dim light□□f their fl□shl□□□□ rev□aled anci□nt arti□□cts an□ cry□tic symbol□ □n the w□□ls. The □ur□her□th□y ventured, th□□more □hey r□□li□ed t□ey were not al□ne in t□e t□nn□l.