Can Katy McKenna outwit a crazy, cozy mystery writer?

With her boyfriend nursing his dying ex in Los Angeles, heartbroken Katy finds comfort blogging her woes and visiting her elderly neighbor, Nina.

One day, Nina tells Katy that her mystery-writing niece, Donna, is coming for a few days. "I'm looking forward to her visit. I haven't seen her in years and have always thought of her as a daughter."

However, two days into the stay, Nina has already had enough of her overbearing niece. She confides to Katy, "Donna's visit can't end soon enough for me."

A couple of days later, Katy drops by for a visit. The surly sixty-something author forbids her from seeing Nina with the excuse that her aunt has a cold and is napping.

After many failed attempts to see her neighbor, Katy fears her friend may be in mortal danger, so she doubles down on her efforts to get beyond Nina's front door.

Is Katy's imagination running wild, or is Donna slowly killing her aunt?