The Alien Artifact 9

During World War II a detective agency investigates the sightings of strange ghostly formations, witnessed haunting a region, never heard of before, even by the most advanced paranormal scientists, and one investigator gains strange magically like powers.
The investigation is almost unsolvable and their investigations with paranormal scientists lead them to use a new highly advanced surveillance technology to scan deep beneath the site, where they discover far more than they expect.
The source of what is occurring is deep underground, buried away, in a cavity, where they discover one of the strangest extraordinary extraterrestrial formations encountered, existing there for centuries, in dormant states, trapped in reality.

Workmen constructing a new section of the London underground near London Bridge during the Second World War uncover a large underground cavity and a workman discovers an ancient map on a tattered piece of parchment inside, which he believes leads to lost treasure.
He hires a detective agency to search for it, before the railway company starts filling in the cavity to complete the railway line, and while they do they investigate sightings of ghostly formations and a killer Santa, and they bring in archaeologists to excavate the cavity and find the remains of an underground Roman burial site.
Leading archeologists are brought in to excavate the site and discover why it is buried away there, so deep beneath the ground, and start digging up what they believe are unknown prehistoric creatures, but soon find they are far more, and they find strange unknown species of life forms, frozen in strange states, as though frozen in ice.
They are far more different than anything they have encountered, and could not have survived on this world, and are some form of mutants, and have a strange energy current running through them, from an unknown source, preserving them.
Scientists unsuccessfully scan below the ground, searching for what is below, but while using a new form of the scanning technology they uncover things that never showed up on the original scans, and realize something below is stopping them from seeing what is there.
Something strange is buried deep below, hundreds of feet below, at least thousands of years old, and a blurred image of it is detected, and after examinations of it they grasp its immense size.
Eventually a tunnel is located, of Roman origins, going straight down towards it!
Deep underground they make contact with an immense celestial formation, five miles in size, under central London, and discover the truth, and of its entrance to the universe, and mankind being created by it, knowing mankind would someday advance and discover it.