Tennis player turned coach Tashi has taken her husband, Art, and transformed him into a world-famous Grand Slam champion. To jolt him out of his recent losing streak, she signs him up for a “Challenger” event — close to the lowest level of pro tournament — where he finds himself standing across the net from his former best friend and Tashi’s former boyfriend.

Just out of jail and still searching for his late beloved Beniamina, crumpled English archaeologist Arthur reconnects with his wayward crew of tombaroli accomplices – a happy-go-lucky collective of itinerant grave-robbers who survive by looting Etruscan tombs and fencing the ancient treasures they dig up. Arthur isn’t interested in the artefacts, though; he’s seeking a legendary door to the underworld, and to Beniamina.