When an emergency room visit turns into a cancer diagnosis that gives Barbie Renfroe mere months to live, she and her husband Dave find their lives turned upside down. But neither is willing to give up without a fight. Three surgeries and hundreds of hours of chemo later, Barbie has defied the odds. Plunge into Darkness takes readers on Dave and Barbie's journey through their battle against cancer and relates how they found family, friends, community and the teachings of Jesus Christ powerful bulwarks against depression and the sense of hopelessness that threatens every person who suffers from cancer. Their story is inspiring, and they hope it will give families and those battling cancer the strength to carry on their own fight.