“Everyone lies.”

On a dawn battered by a raging snowstorm, Dokyung rushes to the hospital with Eunseo, who has been stabbed and is covered in blood. Calling her “sister,” Dokyung desperately begs the doctors to save her.

Soon after, Detective Hyunju arrives at the scene. Amid Dokyung’s confused and fragmented testimony, she senses that a hidden truth is being concealed.

On that night when the snow erased all evidence, as everyone remembers the events differently—who is the real culprit?