Ash, Misty and Brock, per Ash's decision, go though the mountains. However, a blizzard causes Pikachu to get lost and Ash goes to find him. While Ash saves him, he needs to make an ice cave. After the cave is made, Ash goes to call his Pokémon back or they will freeze. However, the cave gets colder, so Ash goes to stop it, but his Pokémon go to warm him up.