Alone and lost, a young cat called Mati struggles to be accepted by the hostile community of street cats at Cressida Lock.

Mati is unaware that he is actually no ordinary cat - but Mithos, the mysterious assassin on his trail, knows it!

To defeat his enemies, Mati must learn to harness an ancient feline power - a power so deadly that it threatens to destroy not only his new-found friends, but every cat on earth...