When a grieving Matt returns back from his travels, he must find a way to shut up the blackmailer that is threatening to reveal his shocking secret to the love of his life; his dead brothers widow.

When audience is quite open to his marrying the widow (since I am) you risk writing an antagonist instead with his current goal (to find a way to silence the blackmailer....why not go to the cops?)

It would be a shocking secret if he had a hand in his brother's death (then again, not what a protagonist would do)

Drop the name for word economy.