The company has 'plugged into' the international market. [=the company has become connected to the international market; the company has begun to do business in the international market]
His friends are 'plugged into' the city's music scene. [=his friends are actively involved in the city's music scene]
The computer program will take data from these sources and automatically 'plug' it 'into' the equation.
(..) It will stabilize! I's under control! I'm in charge here! I's my money! I'm in con... This doesn't change anything. What are you doing? Pulling the plug. No! Rosie! Watch it. That was too close. If he had more than a drop of tritium, (..)2004 Spider-Man 2