In 1520, the notorious and power-hungry Danish King Christian II is determined to seize the Swedish crown from Sten Sture, no matter what it takes. Meanwhile, sisters Freja and Anne make a solemn promise to seek revenge on the men who brutally murdered their family. Everything comes to a head in the heart of Stockholm, where the sisters are drawn into a ruthless political struggle between Sweden and Denmark that culminates in a mass execution, presided over by the mad King "Christian the Tyrant," known as the Stockholm Bloodbath.

Sheena's parents were archaeologists who died in the jungle when she was about six years old, leaving their daughter Shirley Hamilton. She was taken in by Kali, a local Shamaness of a tribe who brought her up, and five years ago she was taught how to morph into animals and birds, acquiring their abilities, even flight. Further, she became a mythical creature called "The Darachna" who relies on people' fear of the unknown. For this she covers herself in a dark liquid mud which allows her to be largely unseen in the low light of the jungle, and with more than normal strength, agility and speed, and armed with a pair of gloves with bone claws, she is a formidable one woman fighting force. She does kill sometimes.