The phrase "under wraps" is often used to indicate that something is concealed or kept secret. There are several synonyms that can be used in place of "under wraps" to convey the same meaning. For example, "under lock and key" suggests that something is being guarded or secured, while "behind closed doors" implies that something is happening in a private or secret setting. Other synonyms include "in a shroud of secrecy" or "hidden from view." Regardless of which phrase is used, the meaning is clear: something is being kept hidden or protected from public knowledge.