At the United States Naval Academy in Annapolis, Maryland, Shane's commanding officer, Captain Bill Fawcett, explains that he has been assigned to escort Plummer's widow, Julie, to Zürich, where Plummer's safety deposit box has been discovered to retrieve the contents. Meanwhile, Shane has been assigned to stay at the Plummer residence in Bethesda, to search for Plummer's secret project called GHOST and look after the family's five children: Zoe, Seth, Lulu, Peter, and baby Tyler. The kids prove to be difficult to handle, even with the help of nanny Helga, who quits when one of Zoe and Seth's pranks intended for Shane goes wrong. Meanwhile, in Zurich, Julie and Fawcett receive word of Howard's deposit box. However, she must provide a password to access it, which she does not know and she and Fawcett end up staying longer than expected. Shane eventually begins to discover the children's problems and resolve them, gaining their trust after saving them when their house was attacked by ninjas.