“When Everything Changed . . .” is a story set in the closing days of the frontier in Montana Territory. Daniel McHarg, a Canadian burdened by a tragic loss, went west to leave his sorrow behind and build a new life. Although he quickly finds himself immersed with characters and adventures that could only exist in the 19th Century American West, at its heart the story is about his love for a woman he met on a Missouri River steamboat and almost lost.