The Goonies Movie Wiki

the Goonies come back after the Fratellis have left and discover their criminal intents, and send Chunk, the group's clumsy, heavy-set dreamer and teller of tall tales, to get help. However, the Fratellis return before they can leave, forcing the Goonies to use a cavern underneath the restaurant to escape. The Fratellis capture Chunk and interrogate him, learning nothing until a pack of bats burst out of the cavern beneath the restaurant. Chunk is placed in the same room with the forsaken and deformed Fratelli brother, Sloth, while the rest of the Fratellis enter the cavern and follow the Goonies' trail.
As the Goonies traverse the cavern, Mikey discovers that it matches up with the map and convinces the rest of the group to continue to follow it to find the treasure. They overcome many deadly traps set by One-Eyed Willie, and eventually arrive at a large underground cavern and a lagoon where Willie's ship, the Inferno, lies waiting. While others begin to fill their pockets with the riches on the ship, Mikey finds Willie's skeleton, and reverently acknowledges him as the "first Goonie", leaving part of the treasure with him as tribute. However, as the Goonies exit the hold, they are caught by the Fratellis, who take their treasure and force the kids to walk the plank.