Soldier Blue-1970 is a western movie starring Candice Bergen, Peter Strauss and Donald Pleasence. Released by AVCO Embassy Pictures, the movie tries to bring a fresh perspective to the 1864 Sand Creek Massacre in Colorado. The film, written by John Gay, is based on the book Arrow in the Sun by Theodore V. Olsen. In the story, Bergen plays Cresta Lee, a sympathetic woman captured by the Cheyenne Tribe. After escaping, she meets Private Honus Gent, played by Peter Strauss, and his Calvary. Also captured is paymaster Captain Battles, played by Dana Elcar. Battles had a box full of gold.
The men who rescued her think she is pretty but has a bad reputation from living with the Cheyenne. Lee has an officer boyfriend at Fort Reunion. Only Gent believes the best in her. Gent falls in love with Lee but feels anger that she sides with the Native Americans instead of the 11th Colorado Volunteers. Lee says the Cheyenne are peaceful.
After surviving a Cheyenne raid, then Lee and Gent travel through the desert to Fort Reunion. Lee and Gent are the only survivors of this raid. During another raid by the Kiowa Tribe, Gent wounds the chief. Then Gent gets shot by gun dealer Isaac Q. Cumber, played by Donald Pleasence. Gent rests in a cave while Lee continues to the fort.
At Fort Reunion, Lee learns about a planned attack on the Cheyenne in retaliation of the initial Cheyenne massacre. Lt. NcNair, played by Bob Carraway, is too distracted to help rescue Gent. Lee's boyfriend ignores her warnings to stop the attack because he wants to ignore her past.
During the Sand Creed Massacre, the Calvary raids an Indian site and savagely kills many women and children. Before the attack, Lee tried to warn Chief Spotted Wolf about the upcoming raid. Wolf decides to peacefully approach the military so the Indians are defenseless when the Calvary attacks.