Shadow of a Doubt

A fiery train wreck consumes Binney Cooper's husband, Norris, leaving her to provide for herself and her twin boys. Left penniless by the loss of her teaching position, she asks a court to declare Norris dead, permitting insurance benefits. Bigamist Norris's second wife, Eliza, also wants that money.
To give Liza the slip, Binney and her twin boys relocate. But Eliza finds her. So Binney runs again, across the continent, this time to Carson City, Nevada, where Blake Taylor, rancher, attorney, and a former suitor during college days now lives. Their friendship becomes a romance, helped along by widower Blake's twin daughters and Binney's sons.
Then Norris, the 'dead' husband shows up to claim his wife and sons. Enraged when he hears of his former wife's interest in Blake, Norris shoots Blake, winging him, while Blake returns fire, killing Norris.
How will they explain to Binney's sons that the father they thought was lost in a train wreck was killed by a man they have come to love, Blake?