Watch One Must Fall (2018) HD Full Movie Free on solarmovie.do. Watch One Must Fall (2018) online free. A horror-comedy slasher set in the 80s about a woman wrongfully fired from her office job and forced...A horror-comedy slasher set in the 80s about a woman wrongfully fired from her office job and forced to take on a temporary job on a crime scene cleanup crew. With a maniacal serial killer on the loose leaving them lots of work, did he ever leave the scene of the crime?