s black cats with adventurous spirits! When they decide to spend a sunny day at the beach, Onyx can hardly wait to explore the shore, while Houdini has a different feeling. With sand between her toes and the vast ocean before her, Houdini can't help but feel a little scared. With the help of her sister, Houdini faces her fear. Along the way, they'll build sandcastles and meet a friendly seagull. Join Houdini and Onyx on this heartwarming adventure where sisterhood and bravery shine as bright as the summer sun!