"A desperate bargain is broken... Constance Greene confronts Manhattan's most dangerous serial
killer Enoch Leng bartering for her sister's life - but she is betrayed and turned away
empty-handed incandescent with rage. A clever trap is set... Unknown to Leng Pendergast's
brother Diogenes appears unexpectedly offering to help-for mysterious reasons of his own.
Disguised as a cleric Diogenes establishes himself in New York's notorious Five Points slum
manipulating events like a chess master watching Leng's every move...and awaiting his own
chance to strike. A vengeful angel will not be deterred... Meanwhile as Pendergast focuses on
saving the unstable Constance in her fanatical quest for vengeance she strikes out on her own:
to rescue her beloved siblings from a tragic fate and take savage retribution on Leng. But Leng
is one step ahead and has a surprise for them all..."--