In the Galactic Veilstone Building, Charon tells about the importance of the Red Chain, which controls Dialga and Palkia. He hopes that the capture of the knowledge, emotion, and willpower Pokémon will become a success to create the Red Chain.
The scene shifts to Diamond, who just arrived at Twinleaf Town. He heads to his house, with Roseanne and Sebastian following him. When he entered, he remembers his mother's happy reaction to his prize trip to Mt. Coronet. Diamond goes into his room and finds a new jacket along with a note that his mother left him. He puts on the jacket and reads the note. According to the note, his mother was at Lake Verity--a great lake where Team Galactic will drop its bomb and capture one of the Lake Guardians. Shocked, Diamond throws off his jacket and rushes out the door, in a hurry to warn his mother about the upcoming disaster.
Meanwhile, Platinum, Maylene, and Candice travel across the snowy mountains in order to reach Lake Acuity. Candice calls out her Abomasnow, and tells it to use Rock Climb to help them go over a mountain. Platinum tells about the time when her father said she went to the lake when she was little. The three of them arrive at Lake Acuity shortly afterwards.
Suddenly, a Sableye appears and attacks Maylene's Riolu with Shadow Sneak. Then, a Gastrodon comes up and traps Candice in a Mud Bomb. Candice realizes that the two Pokémon are actually trained and not from the wild. Finally, Jupiter reveals herself as the trainer of the Sableye and the Gastrodon.
- Diamond continues (and finishes) the running gag of the main characters of the Diamond & Pearl chapter putting on their winter clothing and immediately taking them off.