K3 are heading to Ibiza, but after receiving hundreds of messages from Captain Sloop, they find out he's imprisoned, so the girls decide to go help him. On the island they meet Melissa Dubois, world skateboard champion: apparently she also received messages from the Captain and came to help. X warns the girls that he thinks it may be a trap, and he's right, but the trickster is not Captain Sloop, it's Melissa!!! She's holding K3 prisoners so the Captain will reveal his treasure. Will K3 escape? Or will this be a ghostly rescue gone wrong?