The phrase "alleged plot" means that there is a claim or accusation that a plan or scheme exists, but it has yet to be proven or confirmed as true. Full definition
The Ekiti state government has raised an alarm over alleged plot by the Attorney General of the Federation and Minister of Justice, Abubakar Malami to charge Governor Ayodele Fayose's Chief of Staff, Barrister Dipo Anisulowo; House of Assembly members; Samuel Omotoso, Segun Adewumi and Gboyega Aribisogan to court for treason. (nigeriapoliticsonline.com)
about FBI Informant in Alleged Plot to Blow up Chicago's Sear Tower Now Operating Store in New Rochelle (newrochelletalk.com)
National Coordinator People Democratic Party (PDP) Y outh Frontier, Austin Okai, has raised alarm over alleged plot to assassinate him. (dailypost.ng)