A young man named Gang-Chul (Yoo Ah-In) struggles to make ends meet and doesn't have a regular job. The man then becomes involved with a gang to try to pay for his mother's (Kim Hae-Sook) hospital bills. His mother has Alzheimer's. By chance, Ggang-Chul meets Soo-Ji (Jung Yu-Mi) who comes to Busan alone on a trip. Gang Chul receives comfort from her.