Goodbye, In-Law

because of a misunderstanding 8 years ago, jung da-ae and lee han-eol are mortal enemies. to make things worse, their siblings get married making these two in-laws! but then the bride and groom are killed in an unfortunate accident. in a moment of mourning and arguing in the middle of the road, jung da-ae and lee han-eol are hit by a truck, killed and transported back to when they were in high school! is this their chance to fix everything?!