In 'Chrono Chums: Who's There?', players assume the role of Alex, a quirky historian with a knack for getting into trouble. Alex discovers an ancient device that allows time travel but with a twist – the time-hopping technology mistakenly links Alex with an eccentric group of historical figures, dubbed 'chrono chums', from different eras. Players solve bizarre mysteries by interacting with these figures, each with quirky personalities and unique challenges, while attempting to fix the time stream and uncovering a deeper conspiracy that threatens history itself. Choices made can ripple through time, affecting both past and future outcomes, leading to multiple endings.