When Shark Tagger Keith Poe saw the shark for the first time, he knew it was different. It was aggressive, 13-feet long and had very dark skin. Now, a group of experts lure the beast up from the abyss to determine if the creature is a mako, or mutant, or possibly, a mako and great white hybrid.

Global adventurer Josh Gates solves some of the strangest and most disturbing shark mysteries of all-time, including the real-life bloody inspiration for the movie Jaws and the gruesome case of the Tiger Shark who vomited an arm while living in captivity and ultimately helped police solve a murder mystery.

Josh Gates sends Phil Torres and Heather Amaro on their most perilous mission yet – tracking a legendary monster shark that lurks in the eerie waters of Malpelo Island, 300 miles off Colombia's coast. After terrifying footage of this monster is brought to Josh, he sends his fearless team deep into the ocean to unmask the true identity of this 20-foot-long predator.