Greg Abimbola is many things. He's Black, British and fluent in Russian. He's a snappy dresser, a reasonable teacher, and an unenthusiastic sports fan. But most of all, he's exceptional at keeping secrets. Like, who he really is, and the things he's done. Determined to keep his head down after helping solve a murder in the school basement, Greg fears a trap when Sergeant Rachel Lev of the Pittsburgh police corners him in his apartment. Because his refusal to take credit isn't modesty, it's a survival tactic.