The Secret of Skull Mountain

Frank and Joe Hardy, the famous young detective brothers, are drawn into a new mystery surrounding Skull Mountain, where strange lights and eerie sounds are rumored to come from. The brothers uncover a secret cave in the mountain and a series of mysteries that they must solve. Meanwhile, there is a crisis in Bayport as the city's new reservoir near Skull Mountain is mysteriously losing water every night. Frank and Joe join forces with a team of skilled engineers to solve the baffling mystery and prevent the city from running out of water. When a crime syndicate takes over Bayport's reservoir, Frank and Joe Hardy help their detective father solve the sinister mystery.