Ben is completely fearless. He spends his entire day acting like a brave knight, fighting off invisible slime-burping monsters, moldy green ghosts, and sneaky robbers. He is strong, courageous, and absolutely dedicated to his most important job: protecting his older sister, Anna, from all the imaginary dangers of the world. But when the sun goes down and the shadows stretch across his bedroom wall, Ben's bravery suddenly starts to slip away. The dark is much scarier than his daytime monsters. That is when he learns a wonderful secret. Even the wildest, bravest brothers sometimes need a little help. When night falls, it is Anna's turn to be the protector and keep the scary shadows at bay. This warm and deeply relatable story perfectly captures the shifting dynamics between siblings. It is a tender, comforting bedtime tale that celebrates imagination, family bonds, and the quiet comfort of having someone watch over you.