My Extraordinary Summer with Tess (2019)

While Sam’s family heads out for a Dutch island holiday of togetherness and fun, the 10-year-old decides it’s the perfect time to train himself to be alone. Even if his teen brother is a know-it-all, Sam’s got a great family and no reason to worry. But as the youngest, he fears one day he’ll outlive everyone. His training is interrupted when he meets spirited Tess, who, on a pressing quest of her own, pulls Sam into her madcap scheme. The two discover that, as messy and vulnerable as it is, maybe togetherness isn’t so bad.
Note: includes some explicit language, including sexual references, by teen