Red Balloon.

Tim, a loving father struggling to cope with his adventurous son's cancer diagnosis. In an effort to bring some joy to his child, who is weakened by treatments and forbidden to go outside, Tim brings him a red balloon from the boardwalk every day. When Tim begins to realize that instead of protecting his son, he is actually holding him back, the kindhearted balloon vendor becomes an unlikely ally, and Tim learns to enjoy every last moment with his son.