Daring Do is a wealthy and famous adventurer with a loving husband and an adorable daughter. She lives in a brownstone full of old treasures and relics. She also has a sister.
Ditzy Doo is a post officer who used to be a brilliant engineer, used to work at a university, and used to have a husband. She isn’t bitter over her sister’s success; she’s happy with her life. Mostly.
When the two meet up in Vanhoover with their families, old arguments begin to repeat worse than ever when they become affected by a pair of ancient daggers. It may fall to the ones they love to keep them from murdering the other— possibly literally.

Death tag for ancient assassinations, homicidal thoughts, and the slow decay of all things.
Violence tag for the lead-up to... all of the above. Also, ghostbusting.