The nearly identical suicides of two students at a prestigious private school, both involving stolen handguns, pique the interest of LAPD Lieutenant Detective Pete Decker and his squad. But the focus here is less on Decker and his wife, Rina Lazarus, than on Gabe Whitman, the son of a friend who's living with them temporarily. Gabe, a 15-year-old musical prodigy, also has street smarts learned from his mobster father, Chris Donatti, that stand him in good stead when he's "crowded" and threatened by the clique called the B&W Mafia. Home-schooled Gabe also falls head-over-heels in love with 14-year-old Yasmine Nourmand. While the reciprocal relationship is grounded in love of music (plus raging hormones), it appears doomed by cultural and religious differences.