。
Could you come tomorrow?
Literal
Tomorrow honorable-come [object-を] can-receive-polite [question-か].
A very polished keigo construction: おいで (honorific 'coming' as a noun) + を + 願えますか (potential of 願う in polite form, meaning 'could I ask you to'). Literally 'could I request your honorable coming?' Classical-feeling politeness that'd be at home in a ryokan (traditional inn) or high-end service setting.