Description: David devises a plan to use their new gunpowder blow up a portion of the reef surrounding the island to allow them the sail the ship out. His friends are split on the idea with Mark being the sole opposing voice. Young Aaron Quinn is unhappy at the prospect of losing his new friends. As the time for departure nears, both Aaron and Mark disappear. Aaron has lured Mark deep into the jungle in search of a supposed gold mine in an effort to keep the kids from leaving the island. Mark uncovers the ploy and rushes back to the ship to apologise and the kids set out to make their escape. Using the horses to pull the ship into open water and the kids manoeuvre the ship towards the reef. Helen Aaron and Jeremiah watch anxiously from shore as Tony places the explosives on the reef. The explosion doesn't destroy the reef as hoped as Tony discovers the reef is solid rock and not coral. To make matters worse, the noise of the explosion has woken the entire Q village. As the Prime Minister and his men converge on the lagoon, the kids are able to escape detection under the cover provided by Tony's smoke bomb.