Thirteen-year-old Ruby, a genius code-cracker and daring detective, gets an anonymous call setting a challenge that leads her to the headquarters of Spectrum, a highly secret anti-crime agency that needs her help to crack a code, but soon Ruby uncovers dastardly plans of the Fool's Gold Gang.

Ruby Redfort: Undercover agent, code-cracker and thirteen-year-old genius - there's nothing average about her. Only this time it is an adventure in the wild, and it will take all Ruby's got just to survive. This time, tigers are roaming the streets of Twinford, and it looks like someone has deliberately released some very rare and very dangerous animals. Things are going to get wild - and Ruby is going to get badly lost in the wilderness.

Thirteen-year-old genius and undercover agent Ruby Redfort finds herself dealing with poisonous rumors floating around the community of Twinford that compel her to brush up on her martial arts skills.