Chadzitzin (Episode Zero of The Green Ones)

Calli bears a terrible secret. Only she knows the identity of her parents' killer--her brother, Olin. Forced into a decision with only one correct path among a million false ones, she has to choose between honoring her parents life or avenging their death. With the immortal Ometeotl Guard threatening to destroy the only member of her family she's got left, she has to decide whether Olin is worth the fight.