Dennis Quaid and Trace Adkins star in this inspiring true story behind MercyMes beloved hit song. Running from a troubled home life and a broken relationship, Bart Millard (J. Michael Finley) found escape in music. Hitting the road in a decrepit tour bus, Bart and his band MercyMe set out on an amazing journey none of them could ever have imagined, in this uplifting, music-filled movie that beautifully illustrates the power of forgiveness and Gods love.