If he had only answered that last phone call from the World Trade Center . . .

Minutes before two jumbo jets changed U.S. history, New York police officer Austin Finley ignored the call from his brother, who'd been bugging him for days. Trying to live with his one regret causes hatred and bitterness to consume Austin, and when counselor Mercy Samara recommends desk duty, Austin resigns. Haunted by her own memories of 9/11, Mercy takes a job as a school counselor in Baltimore. When Austin, now an EMT, responds to an emergency at Mercy's school, both are stunned and wary.

Finally their common - and painful - memories turn suspicion into friendship, then romance.

But hard questions linger: Can they truly move beyond their past harsh judgments and harsh words? Will their past finally bring them closer or - as the tenth anniversary of 9/11 draws near - drive them farther apart?