When thirteen-year-old Gerald finds himself the heir to twenty billion pounds from an aunt he never met, he inherits with it a mystery surrounding his aunt's death and various artifacts in the British Museum.

Thirteen-year-old billionaire Gerald Archer and his friends Ruby and Sam Valentine go on vacation to India, hoping to forget about Mason Green and his diabolical quest, but secrets from Gerald's family history and Green's minions have the trio in trouble again.