Grounders are cop slang for easy open and solved cases. A husband kills his wife, a bar-fight with a knife or a gun, cases quickly solved in two or three days. Cops love this and get credit for promotion for easily solving cases. In Grounders the NYPD cops find that this murder of a cook is much more than a simple grounder. It involves the Chinese Tong gangs in NYC, Peruvian rebels who want to overthrow their government by using "magic rocks" that were left from an alien civilization like Stargate in Machu-Picchu, and a love story between a detective and a Tong leader's granddaughter. Grounders combines everything; murder, love, greed, drugs, and rebels amid the backdrop of detectives trying to solve a murder mystery.