A sexually active, rebellious teenager is transformed into a confused and frightened dog by a tramp with magical powers.

Sandra has a lot of growing up to do quickly if she is to survive as a scrounging stray in a rough dogs' world.

She experiences all the physical aspects of being a dog, including running with a pack and going on heat.

She must decide whether she wants to recover her humanity, and if so how to do it - doubly difficult as her brain is reduced to the scattered consciousness of a dog.