Initially, the relationship between Dr. Connor Rhodes and Dr. Ava Bekker is a one-sided flirtation, with Bekker coming on strong, but Rhodes not reciprocating. The two even have something of an antagonistic relationship early on, but after Rhodes' father Cornelius (D.W. Moffett) begins pursuing Bekker, it leads to a bizarre quasi-love triangle of sorts that only ends when Cornelius dies under mysterious circumstances.

In a tragic turn of events, though, Connor's repeated rejections — even in the face of his father's passing — push Bekker over the edge. When Dr. Latham gets suspicious of Bekker, he runs his own investigation into Cornelius' death and discovers that Bekker had poisoned Connor's father in a deranged attempt to win his love. And when her secret is exposed, Bekker dies by suicide, shocking Connor and the staff in what remains one of the most jaw-dropping twists in the history of "Chicago Med."

All the while, Halstead is caught with an illegal firearm, and Manning isn't happy — refusing to marry him unless he ditches it. Halstead finds himself in even more trouble when it's stolen from his car, leading her to break off their engagement. But as their romance ends, another begins, with Charles remarrying his first wife Caroline (Paula Newsome), who returns to Chicago to be treated for a serious illness.

If you or anyone you know is having suicidal thoughts, please call the National Suicide Prevention Lifeline by dialing 988 or by calling 1-800-273-TALK (8255).