In the year 2075, Earth lies desolate, ravaged by alien invaders who have all but eradicated life and oxygen from the planet. Only the resilient cacti have managed to endure the harsh conditions. The aliens, determined to seize control, target the cacti as the last remnants of life on Earth. Granny, a courageous soul who cultivates cacti along the road to ensure they receive sunlight, stands as their guardian. Armed with an arsenal of human pills, which the aliens fear, and a trusty shotgun for dire situations, she is ready to protect her cacti and restore life to Earth. Join Granny in her quest to fend off the alien threat and reclaim the planet for the cacti!