When Nancy Landgraab and Vita Alto compete in Mayor election, the residents of Sunset Valley must choosing side. Dieter Curtiz was among the people who sided with Nancy, and even became leader of the group and enemy with Thornton Wolff, who sided with Vita.
Dieter and his group were almost got into a fight with Thornton's. Fortunately, they were stopped by Gunther Goth, who arrived after John Redfield contacted him.
Four weeks had passed, he and his friends were gathered in the Landgraab house when Holly came, giving something which she claimed could help.
In the inauguration day, he, Simis, and Geoffrey watched the ceremony from the television.