For those unfamiliar with the original song, please watch the below:
SNL - The Lonely Island - Dick In A Box
The sequel, "Mother Lover", features the characters from the original leaving the Brooklyn Detention Complex 5 months later.
To be honest, I don't want to ruin the music video for those that have not seen it yet and don't want to over-elaborate the "plot". Needless to say, the result is a hilarious video and great tune.
SNL - The Lonely Island - Mother Lover