Ash, Iris, and Cilan are taking advantage of a beautiful sunny day at Cynthia’s villa in Undella Town to train for the Junior Cup. Dawn has other come up with other plans. She eagerly tells the friends of a nearby island that she has just learned of from Jervis – an island filled with onix – including one special onix never before seen. Even Ash will forego training to see a special, lucky onix! Jervis drives the friends, along with Meloetta, to the island by boat – warning them to be careful before he leaves them to their adventure. The friends and their pokémon spend some time on the island’s beach for lunch while Piplup and Oshawott find out that Krabby and Kingler can certainly pinch! Ash sees a cave that he thinks may contain some onix. He eagerly goes in without looking and finds that some Wubat are even more eager to leave before he gets there. Dawn and Iris lead the way into the cave. Dawn jokingly states that if they come across an onix the plan is to “run real fast.” Unfortunately this plan gets put into action sooner rather than later. Ash, Cilan and the pokémon become separated from Dawn and Iris. The girls wisely decide to return to the beach while Ash talks Cilan (against his better judgment) into returning to the cave. On their way, Ash and Cilan are attacked by three Onix. Meloetta saves them by changing her form and fighting the onix away. The girls aren’t having much luck either. All of the friends realize they are lost and eventually are chased by an angry, wild onix. The friends are reunited as they are being chased by herds of angry onix. Will the friends ever find the special, shiny onix if all they do is run from them? Is finding the special onix even as important as making it off the island in one piece?