When Tinker Bell crosses the border into the forbidden Winter Woods, her wings mysteriously sparkle. She discovers this happens because she has a sister, Periwinkle, who lives there—both fairies were born from the same baby’s laugh, making them biological siblings. However, an ancient law separates warm-season fairies from winter fairies because crossing the border damages their wings. The sisters form a deep bond despite their separated lives, but are told they can never be together because it’s too dangerous. The law exists because two fairies once fell in love across the seasonal divide, and one broke their wing crossing over—an injury that never healed. When a crisis threatens all of Pixie Hollow, the winter and warm fairies must work together. In the process, Tinker Bell breaks her wing, but when she and Periwinkle’s wings touch, the wing miraculously heals. This discovery allows the seasonal barrier to fall—warm fairies can now visit the Winter Woods safely by having their wings frosted first. The separated sisters are finally free to maintain their relationship. This is a 2012 American animated fantasy film, and the fourth installment in the Disney Fairies franchise, produced by Disneytoon Studios.