When an upper - class household is rocked by what appears to be a home invasion robbery gone bad, the SRU team is called in to save the 4 hostages, including 2 children; Parker and the team soon discover that the family's nanny, Irina, was compliant in the robbery and her boyfriend is the lead hostage-taker. When Irina realizes his true intentions, she begins cooperating with the SRU team while attempting to maintain the hostage-takers trust in order to protect the children she cares for.