Someone is going medieval on Marla's friends, brutally killing them one by one. When she tries to tell people what's happening - a cursed medieval knight is on a rampage - no one believes her. She soon learns that she alone posses...

Follows ten-year-old Annie and Runt, her stray dog, as they attempt to win the Agility Course Championship at the Krumpets Dog Show in London in order to save their family's farm from drought and misery.