In this unique world populated by nesting dolls, Charlie Blackmore is the youngest son of the Blackmore family, forced to work to pay off their debts. After his family becomes enslaved by The Baron, a wealthy and evil industralist, Charlie must now save the remaining Blackmores using his unique ability to hop into other dolls and stop the evil Baron's plans, ending child labour once and for all.

Stacking is a unique puzzle-adventure, in which players are a nesting doll, able to nest into larger and larger dolls, assuming personalities and using their abilities to help solve puzzles and save Charlie's family!