Watch Across the Plains Full Movie Free Online 123Movies. Jennie Lee and her father are on their way to Golden California, from a little Kansas farm, traveling in a prairie schooner. At the last settlement visited by the two, the old man, who has a weakness for drink, purchases several bottles of whiskey, which he begins drinking when they have made camp for the night. A lone cowboy calls upon them and finds the old man in a jovial mood and cautions him to beware of the hostile tribe of Indians, through whose country they are now traveling.