When The Organization assigns Junior Spy of the Year, Brett Willis, to go undercover as K.C.'s boyfriend for a mission, K.C. winds up having real feelings for him. Meanwhile, Craig and Kira receive alarming news that their old arch rival Zane is back and determined to destroy them.

The K.C. doppelgänger gains access to The Organization, now Kira and Craig must race against the clock to save their daughter and the agency.