Tara, Cal and Sparrow are up against Serena. This time the Vampire has stolen a unicorn's horn with which she intends to absorb the young Spellbinders' powers. But that’s only the half of it! Henry Delachasse manages to steal the unicorn from Serena! Our three young Spellbinders must simultaneously locate the mythical animal and get rid of Serena... who has absorbed Tara’s powers!