Two detectives, brothers Borja and Eduard, are contracted by best-selling author Teresa Solana to research the world of so-called alternative therapies. They enroll for a course at Zen Moments, an exclusive meditation center in the ritziest part of Barcelona, only to discover the director murdered, whacked in the head with a statuette of the Buddha. The violent death of a neighbor--who happens to be a CIA agent--simultaneously drags them into an international conspiracy complicated by Borja's attempt to smuggle a priceless Assyrian figurine, the 'Lioness of Baghdad.'