Danny and Valerie Gray are forced to become ""parents"" to a sack of flour for a one-week school assignment. At the same time Skulker, ghost hunter extraordinaire, decides to pit Valerie and Danny Phantom against each other in a contest - with the winner earning the privilege of becoming his prey. When Skulker's orchestrated contest ends in a tie, he handcuffs Danny and Valerie and hunts them both through the Ghost Zone. In order to survive, Danny and Valerie learn to let go of their mutual dislike and cooperate with each other - which may just affect their relationship in the real world. Or, not.