Cosmic Gambit: Echoes of a Black Hole Alliance

1. Where/When:
The narrative unfolds in a not-too-distant future where the cosmology of space is understood to be malleable like clay, a reality made possible by advancements in quantum theory and astrophysics. Human civilization has expanded beyond Earth, establishing colonies on the Moon, Mars, and various space stations orbiting other celestial bodies within our solar system.

2. Important rules of the universe and how it impacts the story:
A central premise of this universe is the plasticity of space-time, a direct consequence of humanity's deep dive into quantum mechanics and its application to interstellar travel and communication. This very principle becomes humanity's double-edged sword when the alien force led by Dr. Valerecys Lumina reveals intentions to transform our solar system into a black hole for their navigational needs, exploiting the theoretical work humans prized for defense and exploration. Human resilience, the innate drive for survival, stirs an unprecedented collaboration across military and scientific communities, which is eventually revealed to play into the alien's grand scheme of testing human cunning and endurance under deceit.

3. The visual description of the universe:
This universe is a breathtaking tapestry of human ingenuity and the mysteries of space. Giant space stations and moon bases dot the cosmos like modernistic lighthouses, serving as beacons of human achievement. Their structures blend cutting-edge technology with designs that cater to human needs for community and aesthetics, illuminated against the velvety backdrop of space adorned with stars and the colorful nebulae. Spaceships traverse wormholes, the bright flashes of their entrances and exits punctuating the darkness like cosmic lightning, showcasing the advanced propulsion technologies rooted in the malleable reality of space-time.

4. Notable technologies or philosophies of the universe that impact the story:
Quantum cryptography and communication play pivotal roles, enabling secure coordination between Earth's forces and its colonies against the alien threat. Quantum entanglement is harnessed for instantaneous data transfer, a crucial edge in the race to counteract the alien plan. Additionally, the concept of space-time plasticity not only offers a means for advanced propulsion and defense mechanisms but also philosophically challenges humanity's perception of reality, pushing the boundaries of what is achievable through unity and collective intellect. This principle of plasticity becomes the battleground and the puzzle: humanity's greatest asset and its most dangerous vulnerability, encapsulated in the inherent risk of their groundbreaking scientific discoveries being the trap laid by their adversaries.

Throughout, the universe brings forth a stark contrast between the luminous hope of human endeavor and the dark intrigues of interstellar machinations, with its vast expanses serving both as a stage for warfare and a canvas for the underlying philosophical enigma of existence and cooperation among vastly different entities. This duality is embodied in the contrasting aspirations and moral quandaries of the characters, marking a journey of intellect, resilience, and the quest for a common ground in the vast, enigmatic cosmos.