'I didn't want to be a Guardian! I didn't want to be in the CIA! I didn't want to go down to Central Park and I definitely did not want cake!' It's Christmas Eve, and Nathaniel Banks is in despair. But when he begs for help from above, heaven help him, they send Anna Frost. Anna Frost has lost everything she holds dear, her job and her sword. She started the day as a lieutenant in Heaven's army, but by the end of it, she finds herself stuck on Earth as a Guardian, in a freezing cold Central Park. Anna Frost is having the worst Christmas Eve ever! Fortunately, Anna is an angel with an F-Plan, and under the watchful gaze of her fellow Guardians, the flirtatious Leonardo and food-loving Holly, this feisty foot-soldier focuses all her efforts on fixing Nathaniel Banks so she can get her feathers back ASAP. But unfortunately for Anna, forgotten footsteps, foul play and forbidden fruit soon put her foolproof plan in jeopardy, and this featherless fighter must learn to move Heaven and Earth if her F-Plan is to succeed.