Walking practice

After crashing their spacecraft in the middle of nowhere, shapeshifting aliens find themself stranded on an unfamiliar planet and disabled by Earth's gravity. To survive, they will need to practice walking. And what better way than to hunt for food? As they discover, humans are delicious. Intelligent, clever, and adaptable, the aliens shift their gender, appearance and conduct to suit a prey's sexual preference, then attack at the pivotal moment of their encounter. But the truth about their existence begins to unravel one night when they fail to kill their latest meal.