When an old unsolved case falls back onto their desks, the BAU calls in reinforcements from Emily's days with Interpol. Becca's arrival stirs the case up, as well as the heart of a certain Dr Reid...
With a rough past and trust issues, Lina Yang joins the BAU in hopes of making the world a better place by putting criminals in prison. But when she meets Spencer Reid, a socially awkward genius with an IQ of 187, she finds herself totally and completely in love with him.