A moonlit spooky picnic on Bone Hill - Daka and Silvania, the vampire sisters, along with their two friends, couldn't have come up with anything more exciting. Just as they are about to settle in for a cozy time, a few terrifying giant bats appear in the night sky and start circling around them. How rude, as these stinky beasts surely didn't receive an invitation. And they certainly don't look like they just want to stay for a piece of spider jelly. Franziska Gehms' funny series for girls aged 10 and up follows the half-vampire teenage sisters Daka and Silvania through their everyday lives with parents and school, as well as through adventures with biting bats and first love.