Purpose: Storytelling is a method for training essential life issues as storytelling can assist learners to consider the story not just as a source of entertainment but as a practical lesson. In fact, teachers can encourage even the most unwilling students by engaging the students in storytelling while maintaining students' attention through narration using sounds and gestures. The present study aims to examine the effect of the university instructor's narrative on English as a Foreign Language (EFL) student's sustained attention, emotional involvement and cognitive learning. Design/methodology/approach: To do so, the study adopted a quasi-experimental research design with the aim of focusing on the students' performance within two different virtual classes. University students' sustained attention, emotional involvement and cognitive learning were assessed in control and experimental groups before and after the treatment. To measure students' sustained attention, Wei et al.'s (2012) scale, which comprises six items, was used. Besides, emotional involvement was assessed through Golestani's (2017) engagement questionnaire. To check students' cognitive learning, the scale designed by Richmond et al. (1987) was utilized. The summaries and conclusions in the experimental class were ingrained in instructors' pedagogical repertoires, as the repertoires offer students an alternative way to understand course material beyond a straight lecture. Students in the experimental group were also asked to ponder over the materials presented to the students each session, and the students were supposed to present a one to two-paragraph note on the possible implications of the materials instructed at each session. Findings: The results of independent samples t-test indicated that there was a statistically significant difference between the two groups regarding the degree of their sustained attention, emotional involvement and cognitive learning. The findings of the present study can raise instructors' awareness toward the application of narratives in their instructional methodologies, as well as putting forth significant strategies to enhance students' sustained attention, emotional involvement and cognitive learning through narratives. Originality/value: The theoretical framework of the study derives from Kromka and Goodboys (2018) conceptualization of instructor narrative (IN), defined as the explicit presentation of the lessons conclusion at the end of each session. Previous studies on narrative have primarily focused on learners' narrative as an educational tool. Later studies on teacher narratives conceive this as the teachers' personal anecdotes and story-like accounts of others' experiences; nonetheless, the position which is taken in this study is more academically laden and is based on the information instructed in each session.