Dora and her best friend, Boots, befriend a little rainbow named Arco Iris while hiking on Rainbow Rock. Terribly shy, Arco hides behind a waterfall so no one can see him -- but the Sun calls out in need of a rainbow for the sky. Dora and Boots set out to help Arco find the confidence to shine. Nickelodeon's favorite bilingual heroine, Dora, leads kids on interactive adventures that capture their imaginations time and time again.