Liz has not left her Berlin apartment in over a year due to agoraphobia, panic attacks, and recurring nightmares. Afraid of the world outside, she has turned her four walls into both a safe space and a prison. When a wedding invitation from her former best friend arrives, she gives therapy one more shot, setting herself the goal of stepping outside within 30 days. Guided by the unconventional Dr. Sommer, who blends exposure therapy with video self-taping, she faces small triumphs – rewarding herself with designer dresses – and setbacks that nearly push her over the edge.