Strong-willed NYPD detective Jane Porter's perfectly ordered life turns upside down when a routine case unexpectedly leads her to primal and passionate Tarzan, now loose in the urban jungles of New York City. After plucking the mysterious feral man from his wild home, Tarzan's billionaire uncle, the CEO of powerful Greystoke Industries, stops at nothing to "civilize" Tarzan in his own image.

Tarzan risks exposure when he assists Jane with a police case, helping her find a group of men responsible for attacking a young woman in Central Park. When Jane's fianc' Michael discovers that Tarzan is alive, he makes a deal with Richard Clayton , offering to help capture his nephew. Meanwhile, Jane contacts Tarzan's aunt, Kathleen Clayton in hopes that she will offer Tarzan shelter and protection.

Jane and Sam hit a dead-end while investigating a young boy's disappearance, and Jane enlists Tarzan's help to use his extraordinary tracking skills to find the child. When Sam learns of Tarzan's involvement and his role in Michael's death, he must decide whether to turn him in or keep Jane's secret.

Richard Claytons fears come true as he discovers that his estranged sister Kathleen is harboring Tarzan and thinks that she is not only after Tarzan's share of the family fortune, but also control of Greystoke Industries. Meanwhile, Jane attempts to stop the sole witness to Michael's death from testifying and possibly incriminating Tarzan before Richard can get to him.

When a friend of Jane's sister Nicki goes missing, they suspect a man she met over the Internet may be responsible. Meanwhile, as the search for Michael's killer continues, Jane begs Tarzan to keep out of sight for his own safety, but when Nicki lands in grave danger, Tarzan finds it impossible not to help.

The lone witness to Michael's death is coerced by Richard to come forward to name Tarzan as the one responsible for the crime, incriminating Jane as well. While Kathleen contemplates giving Richard her shares of Greystoke Industries in exchange for Tarzan's safety, Tarzan considers returning to the jungle.

When the police finally capture Jane, Tarzan agrees to turn himself in to Richard in exchange for Jane's safety and freedom. With Tarzan in his clutches, Richard attempts to have him declared legally insane so that he can claim legal custody of him and his Greystoke shares. Meanwhile, Kathleen fights to free them both.