While investigating the robbery of a local museum, four young friends see some mysterious lights that they believe belong to a UFO on the mesa near the fictional town of Ambrosia, Arizona, and find themselves in real danger.
London detective Sherlock Holmes turns to the Baker Street Brigade, a group of orphans in the district, for help in solving a series of mysterious explosions and deaths on the construction site of London's Underground.
While investigating the dangerous and inexplicable occurrences surrounding an ancient jewelled artifact, Sherlock Holmes and his Baker Street Brigade find unexplained fires, falling masonry, and other sinister events.
Sherlock Holmes calls on the Baker Street Brigade to help solve the mystery of the disappearance of priceless gifts stored in the Tower of London for Queen Victoria's Jubilee.
