Plot

During the 100th birthday celebration of Emerald Cove, 12-year-olds Dave, Freddy and Jonathan stumble upon clues that raise some puzzling questions about the strange disappearance of the lighthouse keeper 30 years ago.

During the 100th birthday celebration of Emerald Cove, 12-year-olds Dave, Freddy and Jonathan stumble upon clues that raise some puzzling questions about the strange disappearance of the lighthouse keeper 30 years ago. Determined to solve the mystery, the three boys soon find themselves on the adventure of a lifetime. Pursued by four bumbling villains, the boys are swept into a whirlwind of adventure and discovery in a madcap race to solve the mystery. Will Freddy, Jonathan and Dave find out what's at the end of the secret passage? Will they fit all the pieces of the puzzle together? And will they get the bad guys?—Anonymous

Adventure is afoot in the small coastal town of Emerald Cove. Dave Shipper (John Weisbarth) is all set to enjoy a quiet summer, but the arrival of his cousin Jon (Frank Jimison) throws a wrench in his plans. Rather by chance, they happen upon an old map that sets them on a quest, along with Dave's friend Freddy (Freddy Rible), to seek out a legendary treasure said to be buried deep inside the ocean cliffs. With the help of an old local fisherman ("Smokey" Tom Hodgins), the boys compile clues that unravel a 30-year-old murder mystery and lead them closer to their prize. They quickly draw the attention of a bumbling crew of malicious treasure-hunters and a mysterious pickaxe-wielding "digger", all intent on capturing the gold for themselves.