Set at the start of summer a year after the events of the show, the game starts with Phineas and Ferb under their tree in the backyard, with Phineas talking about trying to think of a way to make this summer greater than the last. Soon, Ferb developes a new tool known as the Joy Giver, a red whip-like weapon that changes shape, and gives feelings happiness, peace, love, and joy to anyone it lashes. Following Baljeet's next suggestion, the boys travel to a poor town in India to use their new weapon to spread joy to the town, and make everyone happy.