Socially phobic psychiatrist Ida Rosquillos has her life all planned out. She's about to start her dream job as a researcher, where with any luck she'll never see a patient again. She's even managed to develop an eminently logical approach to her previously disastrous personal life---namely, spending all her free time in the lab so she won't have to worry about any messy entanglements. But Ida's rationally ordered schemes fall apart when her ex-not-quite-boyfriend is murdered.
Ida can't stop thinking about how Michael kept calling her the day before he died, and how she ignored his calls, not wanting to get involved in their old drama once again. She wonders if she could have made a difference if she'd talked to him. After all, she helps people for a living (well, at least until she can get a full-time job in the lab). As Ida attempts to reconstruct the last few days of Michael's life, she grows increasingly disturbed that the police have made no arrests and don't seem to be making any progress on the case.
Ida's supposed to know about people and their motivations; here's her chance to put her skills to the test. She decides she'll find out who killed Michael, even if she has to put her research career on hold, even if she has to risk her carefully guarded emotional detachment--even if she has to talk to people.
This is a good character description but there's not much sense of the plot. And "she decides" to change her whole lifeplan to solve the murder of an ex-boyfriend? That doesn't feel right if she's socially phobic --unless you mean she's just a curmudgeon such as Miss Snark ie socially cantankerous, not truly phobic.