Mae gan bob dinas enaid. Mae rhai mor hynafol â mythau, ac mae eraill mor newydd â phlant. Efrog Newydd? Mae ganddi bump.

Ond mae gan bob dinas ochr dywyll hefyd. Mae drwg hynafol o dan y ddaear, yn bygwth dinistrio’r ddinas a’i phum gwarchodwr oni bai eu bod yn gallu dod at ei gilydd i’w stopio.

Every city has a soul. Some are as ancient as myths, and others are as new and destructive as children. New York City? She’s got five.

But every city also has a dark side. A roiling, ancient evil stirs beneath the earth, threatening to destroy the city and her five protectors unless they can come together and stop it once and for all.