(CNN)Dakota Johnson's latest role in the poignant film "Our Friend" taught her life lessons she plans to carry with her.

Johnson plays Nicole Teague in the film, based on a true story about a woman's arduous battle with cancer and the emotional toll it took on her family and friends. Based off of an essay her husband, Matthew Teague [ Casey Affleck] wrote in 2015 for Esquire Magazine, "Our Friend" is about how the couple's best friend, Dane [ Jason Segel] dropped everything in his own life to care for them during their struggle.