also bee-line, 1838, American English, from bee + line (n.), in mention of the expected homing impulse of bees in the field. TO LINE BEES would be to monitor wild bees to their homes in forests. One who uses this profession is known as a bee hunter. [Bartlett, 1859]
probably the most direct route
Vamps jammed both directions of the hall, and Damian sensed Czerno making a beeline for the room behind the wall in front of them.