Newlywed Sa Rin has her first in-law experience and learns what it means to be a "good daughter-in-law."

At dinner, Hye Rin, the other daughter-in-law, speaks out about Sa Rin making her mother-in-law's breakfast.

Sa Rin is shocked when her mother-in-law asks her to cancel a work trip and stay home to cook for her son.

Sa Rin and Gu Young have a fight when Sa Rin alone has to prepare a memorial service with her mother-in-law.

Tension rises when Gu Young asks Sa Rin to act her part as daughter-in-law when they're with his parents.

Sa Rin and Gu Young fight again when she ends up leaving late for a trip due to cleaning up after Gu Young.