Yi-young gets roped into a research paper with Professor Seo, sparking Sa-bi's jealousy. Nam-kyung misguidedly creates tension on the hospital floor.

Though Yi-young's bluntness gets her in trouble, she uses it to comfort a patient's child. Jae-il's need to overachieve becomes a nuisance to others.

Witnessing Do-won being snubbed, Yi-young finds herself getting defensive. Meanwhile, Sa-bi and Nam-kyung can't stop clashing over their differences.