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Rhythm guitarist Tony Kozol and his bass-playing sidekick, Rock Bottom, land a touring gig in Rio de Janeiro's Carnaval, where the hot nights of Ipanema and the sweet songs of love lure Tony's heart to the lovely Silvia. But beneath the vibrant rhythms of samba and seduction, Tony soon learns that Rio has a dark and dangerous side. When murder strikes, Tony and Rock dare to nail a killer whose wealth and power are no match for American ingenuity and an Austin guitarist's broken heart.