Su□d□nl□, a group of shad□□y fi□u□□□ em□rged □rom□the darknes□, blo□□□□g Li Lei and □an □e□mei's pat□. □t becam□ □lea□□that the□ □ere not the o□ly □nes s□□□ing th□ secrets o□□the aban□oned □ansi□n.□A tense□stand□ff□ensued□ and the two friends □ne□ the□ ha□ to think fast to escape. With adr□na□i□e□coursing th□oug□ □he□r veins,□they emb□rk□d on a □ace □gainst□time□to outwit their unexpected □□vals and uncover the u□tima□e□tr□th hidd□n wi□□in □he □□□ths of □h□ tunn□l.