A gentle introduction to Multiple Object Tracking (an important computer vision problem). Here, I discuss the seminar paper FairMOT and how it tackles the problem of multiple objects detection and tracking given a video stream. We used a variant of FairMOT architecture in our work at Jio AI-CoE to detect thefts and identify trespassers at company warehouses and mobile tower sites. The system helped reduce false alarms by 100x as compared to sensor based systems.