Wren, a high school student, finds herself on a wild Halloween adventure after her younger brother goes missing while trick-or-treating. Determined to find him before their mom returns home, Wren enlists the help of her friends, leading them on a chaotic quest through their suburban town. As they encounter quirky characters and unexpected obstacles along the way, Wren must navigate through a series of hilarious and heartwarming mishaps to bring her brother back before it's too late. "Fun Size" is a delightful comedy filled with laughter, friendship, and a touch of Halloween magic. Join Wren and her friends on a night full of surprises, as they discover the true meaning of family and the importance of sticking together no matter how small you may feel.