It's the song that brings ultimate hope to so many...often in the midst of life's most challenging moments. Amazingly, the song was written in mere minutes by MercyMe lead singer Bart Millard (J. Michael Finley). In reality, those lyrics took a lifetime to craft. Although he found faith at a young age, life wasn't easy for Bart. He leaned into an active imagination and his love of music as escapes from a troubled home life. As he grew older. Bart turned to football in hopes of somehow connecting with his abusive father. But a career-ending injury - combined with the vision of a teacher who saw unlimited potential - set Bart on a musical pathway. Chasing a dream while running from broken relationships with his father and Shannon (Madeline Carroll), his childhood sweetheart. Bart hits the road in an old, decrepit tour bus with his new band MercyMe - named for his grandmother's favourite expression. With the guidance of a grizzled music-industry insider, the band begins a journey none of them could ever have imagined.