Kate Wise 04-If She Hid

Two parents are found dead, and their twin 16 year old daughters are missing. With the case quickly growing cold, the FBI, stumped, must summon their most brilliant agent: retired 55 year old FBI agent Kate Wise.
Was this a random murder? The work of a serial killer?
Can they find the girls in time?
And does Kate, haunted by her past, still have the ability to solve cases as she used to?