Crystal stood by the window, watching news about Arctic ice melting. Dr. Chen walked over and handed her a letter: "This is an invitation from the Arctic research station. They need young volunteers to help protect the Arctic." Crystal's eyes lit up—she had always dreamed of seeing that white world. Frost, a polar bear spirit, floated in with snowflakes: "The Arctic is calling us! Many friends there need our help!"
Crystal followed Dr. Chen to the Arctic. Stepping off the plane, she was stunned by the view—endless white ice plains sparkling under the sun, majestic glaciers in the distance. Frost danced happily beside her: "This is my home! The air is sweet, the snow is soft!" Dr. Chen explained: "The Arctic is Earth's air conditioner. Protecting it means protecting our planet."