And his phone buzzed. A text from an unknown number: "You drew it, didn't you? I felt it stop hurting. – Hà" Narrator (Thuyết minh voice): "Doctors cut out the appendix to prevent infection. But some pains are not infections. Some pains are invitations. Will Dr. Lân reply to her message? Find out in Episode 2: The Organ That Grows Back."

One rainy Tuesday, a new patient was admitted to his ward. Her name was Hà. She was 28, a children's book illustrator. Her chart said: "Recurrent abdominal pain, lower right quadrant. Suspected appendicitis."

"Because," Hà said softly, "I think my body knew yours was missing something before my mind did."

Hà pulled out her sketchbook. On the page was a beautiful, half-finished drawing of a man standing alone under a streetlamp. The man looked exhausted. The man looked like him.