Four girl cousins spend summer vacation together with their grandmother on Gull Island.

The Callahan cousins are back for the second installment of their vacation on Gull Island. Grandmother Gee has given the girls permission to fix up their very own quarters separate from the main house, and Neeve stumbles upon a troubling family secret.

Look out, Gull Island! Neeve,Phoebe, Kate and Hillary - the 12-year-old Callahancousins - are staying at their grandmother Gee's ramblingseaside estate. A whole summer without any parents!As the idyllic summer continues the girls discover thatbeing joined at the hip isn't all it's cracked up to be.When the usually shy Kate launches a quest to become 'thecool' girl in town, her over-the-top antics threaten topull the cousins aparthellip;..

Look out Gull Island! Neeve,Phoebe, Kate and Hillary - the twelve-year-old Callahancousins - are back at their grandmother Gee's ramblingseaside estate for Christmas break!When the girls camp out at a whale museum they stumbleupon a mystery they can't ignore. Phoebe takes the leadas the girls join forces to solve an islandmystery.