我妹妹是《河谷镇》的超级粉丝，她每一集都追。

My younger sister is a huge fan of ___Riverdale and never misses an episode.

《河谷镇》的故事发生在阿奇漫画的这个虚构小镇上。

The story is set in the fictional town of ___Riverdale from Archie Comics.