"Best Friends Whenever" is a Disney Channel series that follows two teenage girls, Cyd and Shawna, who discover they can time travel. After an experiment goes wrong, they gain the ability to jump to different moments in their lives, leading to various adventures and challenges. The show explores themes of friendship, loyalty, and the consequences of altering time. Each episode features humorous situations as Cyd and Shawna navigate their everyday lives while dealing with the complexities of their newfound powers, often involving their friends Barry and Nina.