Dr. Michaela Quinn journeys to Colorado Springs to be the town's physician after her father's death in 1868.
As Colorado Springs' Commisioner, Sully opposes a deal to mine for copper to make electricity. In order to sway Sully's decision, Mr. Garrick threatens Sully. Sully and Michaela's daugther, Katie, is then kidnapped while the town celebrates Michaela's birthday. The search for Katie takes Sully, Micheala, and their friends on an adventure through Mexico that is filled with danger at every turn.
When Dr. Mike and Sully travel to Boston for Colleen's graduation from medical school, they find Dr. Mike's mother terminally ill. Sully finds himself a target for assassination by a corrupt politician.
