When an internet vigilante develops a revolutionary new computer program to combat online predators, its rapid advancement leads to serious questions of autonomy, oppression, and what it really means to be human.。该片讲述了一对黑颈鹤“夫妇”迁徙夏季栖息地,交配、筑巢、产卵、育幼直到迁徙离开的全过程,客观再现了黑颈鹤生活中的喜怒哀乐以及人类遵循自然规律、善待自然环境的故事。。