After hearing tales of old-timer Digger Diaz's mining adventures from Tall Tale Tim (the resident storyteller) in Digger's Gold, New Mexico, four children named Mickey, Kareen, Jose, and Julie decide to do a little mining of their own to look for treasure in a large cave and end up losing their way. The Danger Rangers are off to rescue the missing children and showing them that abandoned homes and dark caves are no place to play. Things get worse when Mickey and Kareen end up in a competition with Tall Tale Tim and Giles to get the gold underneath Digger Diaz's house.