After losing his young son to cancer, Dr. Sol Harkens has dedicated his life to the cause of atheism. As a best selling author and a celebrity debater, he has managed to parlay his attacks on Christianity into a very lucrative business. He is not only anxious to share his disdain for God, but he also finds great joy and satisfaction in attacking his Christian opponents on the stage. But even with all the fame and success, Sol is empty and distraught on the inside and his increasing reliance on alcohol to numb the pain is only making things worse.
With the support of his ex-wife Katy's unwavering love and faith, and his own questions about what he may or may not have actually experienced, Sol struggles to find meaning and purpose in the words Let There Be Light.