Jack Frost was enjoying his new life as a guardian and after they defeated pitch..... a new guardian joins them all of a sudden which causes pitch to return....Jack believes it is the spirit of spring's fault and starts to blame her for every problem...The spirit of spring has her own past that she keeps to herself..this has Jack and the Guardians interested...(hmm.....this gets me thinking Jack and the spirit of spring...hmm..ooh -wink wink- ;)