Elliot's mum is ill and his home is under threat, but a shooting star crashes to earth and changes his life forever. The star is Virgo—a young Zodiac goddess on a mission. But the pair accidentally release Thanatos, a wicked death daemon imprisoned beneath Stonehenge, and must then turn to the old Olympian gods for help. After centuries of cushy retirement on earth, are Zeus and his crew up to the task of saving the world—and solving Elliot's problems too?

Elliot Hooper's troubles are far from over: his mum's health worsens, he's struggling at school, and a bunch of anarchic Greek immortals have moved into his home—including teen goddess Virgo, who's in trouble with the Zodiac. What's more, death-daemon Thanatos and his scary mum are at large. As even more immortal allies and enemies emerge, Virgo and Elliot must learn how to be heroes...

Elliot's life is spiralling out of control and his mum's health is worsening. The gods are determined to embark on the quest for the third chaos stone. But Elliot has heard of a mythical potion rumoured to cure all ills... could he save his mum, even if it means sacrificing the fate of the world?

In the finale of Maz Evans' best-selling Who Let the Gods Out? series, Elliot faces his darkest period yet. As well as facing up to the death of his mother, he realises that the future of mankind—and the survival of everything he holds dear—is at stake. But can a bunch of misfit gods, a lost constellation and a mortal boy stand up to the daemon hordes?