Alone and lost, a young cat called Mati is struggling to be accepted by a colony of street cats in the bustling marketplace at Cressida Lock. What Mati doesn’t know is that he is the last of a vital, age-old breed and that a mysterious feline assassin named Mithos is close on his trail. With his enemy nearing, can Mati learn to harness his ancient powers — before a deadly feline force destroys both him and his newfound friends and takes the spirit of every cat on earth?